A species in danger of becoming extinct

the process of taking action to bring a damaged habitat back to healthy condition.

To return captive organisms to an area where they once lived.

Population that is cared for by humans.

The study of methods for protecting biodiversity.

A species that moves into an ecosystem as a result of human actions.

A species likely to become endangered.

Forms when sulfur dioxide and nitrogen oxide combine with water vapor in the air

Original organisms in an ecosystem.

The variety of life.

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