question_answer

In the context of ecosystem productivity, marine upwelling zones are important as they increase the many  productivity by bringing the

1. decomposer microorganisms to the surface.

2. nutrients to the surface.

3. bottom-dwelling organisms to the surface.

Which of the statement(s) given above is/are correct?

A)  1 and 2           

B)  Only 2

C)  2 and 3

D)  Only 3