`->`Find out why some rare animals have become extinct.

`-` Contamination of the environment 

`-` Global climate change

`-` Encroachment on living environment, make full use of agricultural land

`-`Catch fish

`-` Mining and industrial activities

`-` Due to human overexploitation and habitat change due to climate change

`- `Due to the high economic value of precious animals, hunting has led to an extinction

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Species become endangered for two main reasons: loss of habitat and loss of genetic variation. A loss of habitat can happen naturally. Dinosaurs, for instance, lost their habitat about 65 million years ago