BIODIVERSITY
Population - a group of living things within a certain area that are all the same species.
THREATENED - Species that decline so fast that it is likely to become endangered.
Endangered - Species whose population becomes so low that only a few remain, in danger of extinction.
Extinct - Species that has disappeared when the last of its members die.
BIODIVERSITY LOSS - a decrease in biodiversity within a species, an ecosystem, a given geographic area, or Earth as a whole.