Answer:
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
Answer:
Explanation:
Plants use carbon and release oxygen, and animals release carbon and use oxygen.
The answer is transverse wave
So abiotic means nonliving, so the only abiotic option is B. the gravel on the bottom of the aquarium.
