The answer to the 1st one is A
The 2nd one is i think would be D because the answer is plate tectonics so...
The substances water, oxygen, and adenosine triphosphate (ATP) are produced by cellular respiration.
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In human populations, ethnic hatred and civil war can cause two populations to become reproductively isolated as happened in Rwanda where the Tutsi and Huttus blamed each other for the problems of their nation and with the result of no friendly relation between the two and a resulting genocide.
