The change that occurred in peppered moths is an example of a. overproduction b. natural selection c. migration d. isolation

I think it's D, but it could be B.

Explanation:

B. natural selection

Explanation:

when a species needs to breed the males often compete and the stronger of them usually prospers, causing them to be more likely to breed.

Numerous species, or types, of trees are called elms. They belong to the family of plants called ulmaceous. In some cities in the United States and some countries there were a large number of elms, but during the 20th century a plague killed many of them.