Who utilizes the maximum amount of oxygen in the upstream of sewage discharge?

Category: QuestionsWho utilizes the maximum amount of oxygen in the upstream of sewage discharge?
Editor">Editor Staff asked 4 weeks ago

Who utilizes the maximum amount of oxygen in the upstream of sewage discharge?
 
(a) Animals
 
(b) Microorganisms
 
(c) Humans
 
(d) Plants
 
I got this question during an online interview.
 
The question is from Environmental Issues in division Environmental Issues of Biology – Class 12

1 Answers
Editor">Editor Staff answered 4 weeks ago

Correct choice is (b) Microorganisms
 
For explanation I would say: In the upstream of sewage water, the maximum oxygen is used by the microorganisms. Due to this, there is less oxygen availability in the downstream that is rivers, ponds, or the other water bodies where the fully processed wastewater is released.