When a particular white moth lands on a white birch tree, its color has a high adaptive value. If the birch trees become covered with black soot, the white color of this particular moth in this environment would most likely
(1) retain its adaptive value
(2) increase in adaptive value
(3) change to a more adaptive black color
(4) decrease in adaptive value

the correct choice here is (3)

Explanation:

Moths possess the adaptive capabilities of Camouflage and Mimicry.

As a way to camouflage, they can blend into their surroundings during rest. This ability gives them a distinct advantage for survival from predators.  Another adaptive quality of the moth is its ability to confuse or frighten off predators. This quality is known as Mimicry.

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i'm sure the answer you are looking for would be

a. an ice age

hope this contact me if this didn't or you need with more answers : )