A forest of trees with white bark is home to a species of gray moth and to birds
which prey on them. Pollution made the bark of the trees go black. Several years later most of the moths found had wings that were
a) shorter.
b) longer.
c) lighter.
d) darker.

it would affect precipitation by causing flooding in some areas of the world due to climate increasing, causing the glaciers in the northern and southern pole of our planet to melt.

i wish you would have provided choices to simplify it and allow me to give an exact answer.