Решение:
A. Brown bears are important because they control the number of other animals.
- По тексту: "At the food chain, brown bears play important roles as predators (animals that kill and eat other animals) which keep the populations of other animals under control."
B. Which is NOT a threat to the population of brown bears according to the text?
- Вариант 4) People hunt bears to keep them in zoos.
- По тексту: "It is not a good idea to keep brown bears as pets. Human activities are dangerous for the population of brown bears. People cut down trees in forests and destroy places where bears live."
C. A thick layer of body fat helps a polar bear to survive in a cold climate.
- По тексту: "A polar bear has a thick layer of body fat and a coat which protect it from cold air and water."
D. According to the text young polar bears run more quickly than adult bears.
- Вариант 2) run more quickly.
- По тексту: "Younger adult polar bears are faster than older bears, as they do not have as much fat as adult bears."
E. Polar bears have to hunt a lot of time because they must be at the top of the food chain.
- Вариант 4) they must be at the top of the food chain.
- По тексту: "Polar bears are the top of the food chain and have an important role in the food chain."
Ответы:
A - 1
B - 4
C - 1
D - 2
E - 4