Because of the climate and the protection that the trees provide. Because rain forests are in tropical regions, they get a large amount of sunlight which helps the plants grow. These plants then feed the animals and help them thrive. The canopy-like structure gives animals places to hide and live.

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.