Which is the best definition of conservation biology?%0D%0A%0D%0A%0D%0Athe use of science to restore ecosystems%0D%0A%0D%0A%0D%0Athe protection of habitats in national parks%0D%0A%0D%0A%0D%0Athe research of threatened species%0D%0A%0D%0A%0D%0Athe passing of laws to reduce pollution

The best definition of conservation biology is the research of threatened species.