A. Brown bears are important because ....
The correct statement is:
- they control the number of other animals.
Explanation: Brown bears play an important role as predators in the food chain, which helps in controlling the populations of other animals. By preying on other animals, brown bears help maintain balance in the ecosystem.
B. Which is NOT a threat to the population of brown bears according to the text?
The correct statement is:
- People hunt bears to keep them in zoos.
Explanation: The text mentions several threats to the population of brown bears, such as people killing animals, destruction of forests where bears live, and hunting bears for trophies. However, keeping bears in zoos is not mentioned as a specific threat in the text.
C. A thick layer of body fat helps a polar bear to ...
The correct statement is:
- survive in a cold climate.
Explanation: The thick layer of body fat and coat of a polar bear help insulate it from the cold climate, enabling the bear to survive in harsh Arctic conditions.
D. According to the text young polar bears ... than adult bears.
The correct statement is:
- run more quickly
Explanation: The text mentions that younger adult polar bears are faster than older bears because they do not have as much body fat. They can run at speeds of up to 25 miles per hour.
E. Polar bears have to hunt a lot of time because ...
The correct statement is:
- they need to be fat.
Explanation: Polar bears need to hunt frequently to consume enough food to obtain the fat reserves necessary for survival in their harsh Arctic environment. Being at the top of the food chain, they need to maintain their fat levels to thrive in their habitat.