America is to American as Prussia is to Prussian, if that's what you mean.
(that's called a demonym)
The answer of this problem is B , that is the only one that makes sense so I am saying it is B as the final answer
They aerate the soil, pollinate blossoms, and control insect and plant pests. Many insects, especially beetles, are scavengers, feeding on dead animals and fallen trees, thereby recycling nutrients back into the soil. As decomposers, insects help create top soil, the nutrient-rich layer of soil that helps plants grow.
hope this helps (:
