Can mushrooms replace the plastic ?

Yes mushrooms can replace plastic that is because most of our plastic is already made up of funges and chemicals as well. Although it would probably hurt the ecosystem because they play a role in our ecosystem I would not do it. even though it would probably not produce the same amount of pollution

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.