Цель: Понять
A. Brown bears are important because they control the number of other animals. Brown bears play an important role in the food chain as predators that help keep the populations of other animals under control by hunting and eating them. This helps maintain the balance of the ecosystem.
B. Which is NOT a threat to the population of brown bears according to the text? The correct answer is 4) People hunt bears to keep them in zoos. While the text mentions that people hunt brown bears as a trophy and destroy places where bears live, it does not specify that people hunt bears to keep them in zoos as a major threat to their population.
C. A thick layer of body fat helps a polar bear to survive in cold environments. The thick layer of body fat serves as insulation to protect the polar bear from cold temperatures. It acts as a barrier to maintain body heat and helps the polar bear adapt to the Arctic's icy conditions.