Answer:
peppered [moth] populations changed...
Explanation:
The peppered moth originally had white wings with black spots, which blended in with the tree trunks they would land on. This kept them hidden from predators.
A genetic mutation was found in which some moths appeared with black wings with white spots. Predators could easily spot these moths, so there were much less of them.
During the industrial revolution, smog put into the air by new factories would cause the once white trees to be coated in black from the pollution.
Now, the white moths with black spots were more easily identified than their genetically mutated counterparts.
The black moths with white spots were now the ones that could camouflage with the tree trunks, and became the dominant variation as the white moths were being eaten.
