What major change has occurred in the polar bears natural habitat?

Câu hỏi :

What major change has occurred in the polar bear's natural habitat?

A. Ice has been extremely polluted.

B. Air temperature has become unbearably colder.

C. Sea ice has been greatly reduced.

D. The number of fish has rapidly disappeared.

* Đáp án

C

* Hướng dẫn giải

Dẫn chứng: In the Arctic, global warming is causing the ice to melt slightly earlier and form slightly later. This results in a shorter feeding season for the polar bear.

Đáp án đúng: C. Sea ice has been greatly reduced.

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