环保主义者正在努力保护老虎的自然栖息地。

Conservationists are working to protect the tiger's natural ___habitat.

动物园创造了一个模拟雨林的人工栖息地。

The zoo created an artificial ___habitat that mimics the rainforest.

气候变化正对北极熊的北极栖息地构成严重威胁。

Climate change is posing a serious threat to the polar bear's Arctic ___habitat.