Why do animals have shells?

Answer 1

Turtles, snails, crabs, clams, oysters, shrimp, mussels, and eggs have shells because the creature can't protect themselves and Tom Fernanders otherwise many predators would simply attack the animal and eat it.

Answer 2

mollusks use their hard shells, if they have any, to protect themselves. also they use things in their environments, such as rocks etc...

Mollusks use their Shells for protection.
most gastropods have a hard shell they can retreat into

bivalves have two hard shells they can lock themselves up into.

Limpets have dorsal plates.

Answer 3

To protect them from other animals.

To hind from other animals.

To live in them like some turtles do.

Answer 4

by protecting themselves

Answer 5

They withdraw back into their shells.

Answer 6

It's shell.