During the industrial revolution in England, a population of light-colored moths population fell while a population of dark-colored moths population rose. Both types of moths were usually found on the trunks of trees in cities. Apparently, birds were eating the light-colored moths at a faster rate than they could reproduce. But they were leaving many of the dark-colored moths alone.

Question

What is the BEST explanation for this data?

Evolution is happening before our very eyes—just ask the peppered ...

a
The birds' vision had become impaired.
b
The white moths had become tastier and more desired.
c
Dark-colored moths flew faster than light-colored moths
d
The trees had become coated with soot and the dark moths were better camouflaged.

Answer 1

d. The trees had become coated with soot and the dark moths were better camouflaged.