What do many ecologists feel is necessary for an area to be classified as a forest? a.) several species of trees

b.) enough trees to create a close canopy

c.) consistent warm weather

B. Enough trees to create a close canopy.

Explanation:

Forests may have several tree species but one very important feature of forests is their close canopy of dense trees, often arranged in several strata (or layers).

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.