Human activities such as pollution , like trash , or boat oil can effect the waters that house 100 of creature and as for nitrogen cycle things like forest burning and fossil fuel combustion can result in the increased deposition of nitrogen from atmospheric sources
200,000 is the population density.
A2
B4
C1
D3
I think sorry if I get one wrong
The order of elements by volume-fraction (which is approximately molecular mole-fraction) in the atmosphere is nitrogen (78.1%), oxygen (20.9%), argon (0.96%), followed by (in uncertain order) carbon and hydrogen Explanation: google.
This answer is C. Disruptive selection
This is because the normal distribution curve is shifting in one direction or another