Answer:
here is the order
Genetics
Allele
Hybrid then law of independent assortment
Law of segregation
Bacteria to amphibians. amphibians started to turn to fish and some started walking to land. They started laying eggs and turning into reptiles. those reptiles started growing hair turning them into four legged mammals. the mammals then turned to primates which evolved into us.
I'd say D but i'm not 100% sure
Your answer would be "nucleus accumbens"!