Answer:
I think it is the first one
Explanation:
I
B is not right
c or a,
a is not right
c is correct because they need each other to live
hope that helped :)
Quick Answer. Collagen is the protein that all animals have in common, even single-celled animals and creatures such as sponges that lack differentiated bodies. Collagen is a cable-like protein that can calcify into bone, shell or other hard structures.
HOPE THIS HELPS AND GOOD LUCK
MARK BRAINLIEST PLZ!!!!!!!!
