I think A but I'm not totally sure!! Good luck.
it's D but I might be wrong
B. How far do butterflies migrate
A, C and D are opinions not facts.
<span>The answer is B) cell wall. The cell wall is a structure important cell protection and shape. It is necessary for the survival of unicellular organisms, such as Archaea and bacteria. Plants, some fungi, and algae also have cell walls with major function in structural support and protection against environmental conditions and infection. However, animal cells do not have cell walls.</span>
Starfish has a endoskeleton
a coral has a exoskeleton
sponge has neither