In the stable food chain shown below, what would you expect to happen initially if you were to suddenly double the population of rabbits? A food pyramid, top to bottom: hawk, snakes, rabbits. a. The populations of the other three species would also increase. b. The populations of the other three species would decrease. c. The grass population would decrease. The snake population and hawk population would increase. d. The grass population and hawk population would decrease. The snake population would increase.