What might happen to the food web below if the number of phytoplankton drastically decreased?
1. small fish and wading birds would be affected.
2. only the small fish would be affected.
3. the small fish, bivalves, and invertebrates would be affected.
4.the entire food web would be affected.

jjrnfnf

explanation:

b r

he may like cookies

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.