The answer is the pigment red
From my knowledge I mostly think its Thalilacea
I think this because even though it can be Appendicularia too, Thalilacea has BOTH a tail and notochord in the adult stage
your answer is B. because An animal must do three things to control body temperature. First, the animal must find a source of heat. Second, it must find a way to conserve heat when temperatures in the environment are too cold. Third, it must find a way to get rid of extra heat when temperatures in the environment are too hot.
A zygote consists of one cell.
Physical
becouse it is the tree that is creating the cracks and the tree is physical