How did anikin skywalker die?

Answer 1

He died when he sacrificed himself for his son Luke, who was being electrocuted to death by the Emperor. At that moment, he realized his son was right and that there was still good on him. But when he killed the Emperor by throwing him into a reactor core, the Sith lightning malfunctioned the armor keeping him alive

Answer 2

When saving his son, Luke, from Palpatine, the emperor's Sith lightning compromised Vader's suit and the machines inside it that were keeping him alive.

Answer 3

It was the hardships of slavery of the Tuscan Raiders, and the greif of thinking she would never see her son Anakin again

Answer 4

Tusken Raiders killed her in Star Wars Episode II: Attack of the Clones, shortly before Anakin attacked a Tusken camp killing many of them and almost turning to The Dark Side of The Force.