Biological communities in a stream vary based on :

(I) Water velocity

(II) Allochthnous material

(III) Size of the particle on the stream bed (IV) Depth of the stream

[A] (I) and (II) only

[B] (I), (II) and (III) only

[C] (II), (III) and (IV) only

[D] (I), (II), (III) and (IV)

Answer & Explanation
Answer: (I), (II), (III) and (IV)

Environmental Studies Short Question | Gkseries