because they protect themselves:)
turtle rino armadillo snail crocks
Bivalves ( clams. mussels, scallops)
Calcium
some animals such as clams have hard shells to protect them. sometimes if a predator sees a sheel it will either think it's a rock, but even if they dont think its a rock they will struggle to get the clam out of the shell even though some animals are able to.
insect
Not of my knowledge no. :( it would be fun if they did though =)
an art form that can be made with natural resources like shells plants and animals
Animals have a lot of ways to protect themselves or to hide them like camo, poisons, spiky points, odors, etc.
Leathery shells = Hard shells
It’s call a skeleton ahhhh I sorry I tried to be funny but failed yaa don’t be like me.
Limestone is a rock that is formed from the skeletal remains of sea animals and plants. It is primarily composed of calcium carbonate, which is derived from the shells and skeletons of marine organisms such as coral, mollusks, and foraminifera. Over time, these remains accumulate and become compacted and cemented to form limestone rock.
Some examples of animals with shells include snails, clams, oysters, turtles, and hermit crabs. Shells serve as protective outer coverings for these animals, providing support and defense against predators.