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Which interaction is an example of commensalism?
O A. Insects helping plants reproduce while eating the nectar in their
flowers
O B. Bacteria living inside a human's stomach and making the person ill
C. Birds building nests in the branches of trees
O D. Mosquitoes eating the blood of cows and passing on a disease
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C. The birds benefit from the shelter of the tree branches without harming the trees

Answer:

C

Explanation:

Commensalism is where one organism benefits while the other is neither harmed nor benefited.

A - Both parties benefit

B - Bacteria benefit, the human is harmed

C - Birds benefit, the tree neither

D - Mosquitoes benefit, cow is harmed