Answer:
A. Methane gas from agriculture Pollution.
Explanation:
Methane gas is a great contributor to the global warming. It effects the green house of the earth and ozone layer is deteriorated. Grand father mountains are located in the North Carolina where the Methane gas pollution destroys the trees.
Another name for unicellular organisms that dominated Earth up to the Precambrian time is prokaryotes. The correct answer is D.
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