No, the skin of the olive is similar to a peach, not to an acorn.
The shell is hard.
Grasshoppers do not have a hard shell.
with it's hard shell with it's hard shell
The tortoise's shell is their home. The shell has a hard cover and can protect them when something hard hits it. If they do not have the shell, they would have died fast.
A hard shell animal? Like a crab or snail?
raisins
The shell.
turtle rino armadillo snail crocks
There are not any adult moths that have a hard outer shell. However, a pupa from the Gypsy Moth do have a hard outer shell for protection until it hits adulthood.
really hard
The hard shell of a lobster is known as the chitin.
The hard shell protects the very soft body of the mollusk.