The primary reason that the human population has grown rapidly over the past 100 years is that there has been

A an increase in food supplies and better access to clean water.

B
a decrease in cancer rates due to scientific research.

C
more access to renewable resources.

D
more access to light and electricity.

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .