What characteristics make a species vulnerable to extinction?

Many rare and/or endemic species exhibit one or more of the following attributes which make them especially prone to extinction: (1) narrow (and single) geographical range, (2) only one or a few populations, (3) small population size and little genetic variability, (4) over-exploitation by people

the answer is: metamorphic rocks often show the presence of fossils, also a

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-lavira: )