3.what do living and nonliving things to in an ecosystem?

A.die
B.interact
C.live
D. multiply

4. which of the following area where mud from the seas or rivers is deposited?

A.coral reefs
B. mangrove forests
C. mud flats
D. salt matches

5. which of the following is a biotic factor?

A.animal
B. microorganisms
C. plants
D. all of the above​