So, i had a dream i was at a family gathering at my grandma's house. and there was a fat bald guy named derrek. this derek guy triggered me into some crazy possed thing and i would make grwoling noises and attack him. what does this mean? idk anyone named derek btw

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 .