Answer:
Option (C)
Explanation:
In the case of deeper rivers, the flow of water is comparatively slow. But on the other hand, in the case of rivers which have a shallow depth, narrow river channel and where the water flows at a relatively faster rate, there the sediments are carried in suspension mode, transported to a long distance, and are mostly deposited in the seas and in the delta environment.
The fishes living in the deeper water zones are dependent on the sediments and nutrients that sinks from the surface to the bottom of the water body. These sediments and nutrients are mainly consumed by the fishes in the deeper rivers.
Thus, the correct answer is option (C).
