How did Charles Darwin use the theory of natural selection? A. To determine which finches to study aboard the HMS Beagle
B. to map the movement of tortoises in the Galapagos Islands
C. to survive on the Galapagos Islands during his studies of evolution
D. to explain how species change over time to survive

I believe it's D but I just want some reassurance

Residential construction is expanding in florida, the expansion has caused fragmentation of habitats, one of the results of the increased construction is a decrease in the number of large predators such as the coyote, black bear and pool panther, which will be the most immediate local result of this fragmentation? 1)large predators will become extinct 2)decrease in middle sized predators 3)increase in population of top carnivores 4)increase in population of prey species