the survive with their hard shell
A hard shell animal? Like a crab or snail?
Turtles
If it doesn't have a hard shell to protect it, it will most likely have defenses like claws size teeth and stuff like that.
Armadillo
i could be a crockodiol
No. If you have found a hard rock with an animal print on it, it may be a fossil.
hide from predators
Sement .
sulg is same as snail
Their hard outer shell. They just pull themselves in tight when things get scary.
They survive by reproducing. Sunflower seeds are protected by a hard woody shell that allows them to withstand weathering until it is time to germinate.