The answer is C because it’s something that can be caused by speciation, not can cause it
It indicates what elements is composed by and how many atoms of one element are linked to the other.
For example, this is the formula for table salt is:
NaCl
The formula indicates that table salt (sodium chloride) is composed by sodium (Na) and chlorine (Cl) on a 1:1 ratio.
Hope it helped,
BioTeacher101
The answer is "Groundwater"
When infected by a virus, a host cell produce many thousands of identical copies of the original virus. so the answer is B
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