The studies of changes between black and light color in populations of the peppered moth show that
O
O A. natural selection
can change allele
frequencies and
common
phenotypes in a
population.
B. species can always
adapt to
environmental
changes.
O
C. predators prefer
light colored moths.
D. dark moths are
physiologically
superior to light
colored moths.

you did not attach the discourse, but i assume it to be the discourse on the origin and basis of inequality among men (the original titile in french is: "discours sur l'origine et les fondements de l'inégalité parmi les hommes"), also know as "second discourse". in this discourse, jean-jacques rousseau emphasizes that private property is the basis of all inequalities.

therefore, what enabled the old regime to maintain as long as it did was private property.

substitution is the answer in this case

fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.