Solute particles inside increase or decrease

in what solution?

Explanation:

-

it can increase

Explanation:

can be backed up by

The simplest way to change the concentration would be to change the amount of solute or solvent in the solution. Increasing the solute would increase the concentration. Increasing the solvent would decrease the concentration.

hope that helped

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.