All snails need water to survive. I doubt that they will survive lack of water. First, water snails have to live in water, or else they will dry up (I know this from experience, because once my water snails crawled out too much that they crawled out of the aquarium. I found them underneath the dinner table, dried up like un-cooked pieces of macaroni.). I know garden snails will drown in water, but without water they dry out as well, and will go inside their shells and won't come out. So both types of snails won't be able to survive lack of water, in my opinion.
I don't think you understand the meaning of that term, because snails reproduce asexually, so....
No, even land snails need some amount of water to survive, as it is required for many basic bodily processes.
they survive by eating
it does not
because
the wet ones
Some decomposers in wetlands are..... Snails, insects, birds, earthworms, etc.
by diging a hole in the ground
no
Because they need to be moist to survive.
Yes, snails can survive cold temperatures. The snails will stay out until the temperature turns to freezing then they will seek shelter.
Snails are capable to live in every wetland. They are adapted to the environment and live as decomposers of wetlands.
Their main source of food is there. Fish.
yes
Snails are more active in the dark because at night, it is cooler at night than in the daytime. Snails have to stay moist to survive.
One wetland animal, the beaver survives by building a dam.