The number of primary consumers would increase because they would not get eaten.
Answer:
Deforestation would be your answer.
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Answer: C
Explanation: Smaller single-celled organisms have a high surface area to volume ratio, which allows them to rely on oxygen and material diffusing into the cell (and wastes diffusing out) in order to survive. The higher the surface area to volume ratio they have, the more effective this process can be.
Its either B or D. That's about all i can do. sorry