I think the correct answer is a
Answer:
All animals are eukaryotic, multicellular organisms, and most animals have complex tissue structure with differentiated and specialized tissue. Animals are heterotrophs; they must consume living or dead organisms since they cannot synthesize their own food and can be carnivores, herbivores, omnivores, or parasites.
Explanation:
"an increase in predators" would likely lead to an increase in genetic variation in a population of squirrels, since the squirrels would have to adapt to the new threats.