Answer:C
Explanation:it gets rid of waste
I think it's A but it might be different from your school and mine
Yes you are correct hope you do well
It can be a compound or a single element. An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. There are about 117 elements, but carbon, hydrogen, nitrogen and oxygen are only a few that make up the largest portion of Earth.
I would say pure substances
