This diagram seems to begin with Multicellularity. So, as you follow the line, the next is tissues, then three-germ layers, bilateral symmetry
So, right before 3 germ layers is tissues
So, the answer is D
Parasitism mutualism commensalism. competition. A relationship in which different indiv or pop attempt to use the same limited resource. Competition Ex. eagles and bears. They both can go after fish. Predation. Organism that feeds upon it's prey. Predation Example. mouse and a snake. Snakes eat the mouse<span>. Parasitism.
Hope is helps in someway
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D. they are homologous
homologous is when the organs/limbs etc are similar in position and structure but the function doesn’t have to be the same