The diagram shows the bone structure of the front legs of two animals: a frog (amphibian) and an alligator (reptile). shading is used to identify similar bones.

how does a comparison of the bone structures of the two animals provide evidence of an evolutionary relationship?

a.
the analogous structures are evidence that one animal evolved from the other.

b.
the homologous structures are evidence of descent with modification from a common ancestor.

c.
the homologous structures are evidence that one animal evolved from the other.

d.
the analogous structures are evidence that the two animals do not share a recent common ancestor.