What other organism in the nature do you see having the same type of ecological role in their environment?

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explanation:

the correct answer is:

a population changes in response to a change in the environment.

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide