Which of the following best describes the characteristics of less fertile soils, increase in disease-carrying mosquitoes, and flooding of homes and villages?

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

can you make it bigger i can't see it

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves