The ptarmigan is a seed-eating Arctic bird that changes the color of its feathers with the change
in seasons. In the summer it is a brownish color,
and in the winter it is white.
Which of the following provides the best
explanation for this change?
A.
The color change helps it find food more
easily.
B.
The color change helps protect it from
predators.
C. The color change helps it regulate its body
temperature better,
D. Brown feathers are better than white ones for
flying during mating season.