No, monsters can only be normal or special summoned to the monster card zone. Crystal Beasts go to the S/T zone when destroyed, you don't place them there automatically.
no, they are treated as spells
Relinquished is Ritual Summoned with the Ritual Spell Card Black Illusion Ritual. It requires a monster as a Tribute to Special Summon Relinquished from your Hand. Once Relinquished is successfully Ritual Summoned, if it is sent to the Graveyard, it is eligible to be Special Summoned from it. You cannot Special Summon Relinquished from the Graveyard unless it was successfully Ritual Summoned first.
Relinquished can only ever initially reach the field by being summoned from hand, using an appropriate Ritual Spell Card - or by any card that specifically lets you summon a Ritual Monster from other zones.Relinquished cannot be special summoned from deck by cards like Reasoning, or Mystic Tomato, etc.
No, the Crystal Beast goes to the graveyard if tributed. Crystal Beasts only get to choose to go to the S/T zone if they are 'destroyed'. Tributing, or 'sending', are not destruction effects. Effects that destroy will say so on the card, and also monsters can be destroyed by battle.
Currently, there is no possible way for this to occur.Uria, Lord of Searing FlamesFire/Pyro/EffectATK/0 DEF/0This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by sending 3 face-up Trap Cards you control to the Graveyard**. This card gains 1000 ATK for each Continuous Trap Card in your Graveyard. Once per turn, you can destroy 1 Set Spell or Trap Card your opponent controls. Spell and Trap Cards cannot be activated in response to this effect's activation.**This sentence implies that Uria, Lord of Searing Flamescan only be Special Summoned from your Hand. As a general rule, unless the card specifially states that it is Special Summoned from the Deck, you can assume that it is referring to your Hand.
No, they can only enter the S/T zone when an effect places them there. They usually go there when destroyed, as per their own effect, but Sapphire Pegasus can place them there from deck too.
no, they are treated as spells
Crystal Beasts in the Spell and Trap Card Zone can be treated as Continuous Spell Cards, allowing you to activate their effects and send them to the Graveyard when destroyed. This means you can activate their effects from the Spell and Trap Card Zone, like summoning Crystal Beast monsters from your Spell and Trap Card Zone. Just remember, they can't defend your Life Points like a good ol' fashioned Trap Card.
Because it is an 'only be special summoned by..' monster, that means it can be special summoned by cards like Monster Reborn, after it was summoned properly but was destroyed. Note that a field spell card is in no way part of Malefic Blue-Eyes White Dragon's summon condition. MB-EWD will simply be destroyed if it is ever face-up on the field, and no Field Spell Card is in play. So if Monster Reborn was used in this case, MB-EWD would be special summoned, and then destroy itself.
Relinquished is Ritual Summoned with the Ritual Spell Card Black Illusion Ritual. It requires a monster as a Tribute to Special Summon Relinquished from your Hand. Once Relinquished is successfully Ritual Summoned, if it is sent to the Graveyard, it is eligible to be Special Summoned from it. You cannot Special Summon Relinquished from the Graveyard unless it was successfully Ritual Summoned first.
No, only from your hand. They can be special summoned from graveyard by cards like Monster Reborn if they were properly summoned initially before they went there. However you can't resummon them from the graveyard with their Ritual Spell Card.
Beasts, You spelled it right
No, they can not be used for Tribute Summons. The one scenario that they could be used as Tributes is to summon "Hamon, Lord of Striking Thunder" since Crystal Beasts in the Spell/ Trap card area are treated as Continuous Spells.
When a card, such as Spell Striker, requires an action to be Summoned, the action will almost always be performed first before the monster is Summoned. Therefore, concerning Spell Striker, to Special Summon it, you must remove one Spell Card from play first, then you place it on the field afterwards.
Relinquished can only ever initially reach the field by being summoned from hand, using an appropriate Ritual Spell Card - or by any card that specifically lets you summon a Ritual Monster from other zones.Relinquished cannot be special summoned from deck by cards like Reasoning, or Mystic Tomato, etc.
You can't special summon Green Baboon when a Beast monster is destroyed while it is somehow in the S/T zone, by either being equipped by Relinquished, or go there themselves like Crystal Beasts. The reason is, they are destroyed as Continuous/Equip Spell Cards, not as monsters, even though they revert back to monster cards when they're in the graveyard.
Oh, dude, making an anti-Crystal Beast deck is like trying to avoid getting caught in a rainstorm without an umbrella - not impossible, but definitely a pain. You wanna pack your deck with cards that can counter those shiny crystal critters, like spell and trap removal, monster negation, and maybe some good ol' monster destruction effects. Just remember, the Crystal Beasts may sparkle, but your deck needs to shine brighter to take 'em down!