Problem: Two teams studied two types of animals: team A studied predators, while team B studied grazers. They learned a lot from this experience. Which team learned that if all of the wolves are removed from a population, then the population of deer or rabbits may increase?

A: team A

Problem: Two groups of scientists examined two fires. Group A put a large log on it, and group B made a fire with small twigs. They wanted to see which fire would last longer. Which group had a fire with wood made from smaller particles?

A: group B

Problem: Hawk and Brunt were two colleagues studying about plants. Later on, Hawk got specialized in normal plants, while Brunt decided to learn more about epiphytes. Which colleague studied less about plants that grow on other plants?

A: Hawk

Problem: Two siblings went to the eye doctor, they needed eyeglasses. As it turned out, Ann had myopia, and Jane had farsightedness. They both bought eyeglasses. Which sister had her vision corrected with concave lenses?

A:
Ann