All of these represent something called "competition and predation", in which the species competes for strength, or when one species coordinates attacks against a prey species, or when one species hunts another.
I believe it is <u>instinct </u>that is the behavior of the caterpillar building a cocoon.
The answer to the question is A
The synthesis of thyroid hormones requires the iodination of tyrosine molecules and the combination of two iodinated tyrosine residues
