Show work, answer please, Based on the theory of natural selection, which of the explanations BEST describes the change in the beak depth of the medium ground finch during the dry years? A.
The beak depth of the finch population decreased.

B.
The beak depth of the individual finch increased.

C.
The beak depth of the individual finch decreased.

D.
The beak depth of the finch population increased.