I need help please! This is a question on genetics!

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 .

Vessels draining the myocardium of the heart, open primarily ,into which chamber?

Which could be a pathway of food through an ecosystem