Question

Que) A river with high BOD (Biochemical oxygen demand) value is.....

1) highly polluted
2) highly clean
3) highly productive
4) none of these
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Answer 1

Answer:

the answer is highly polluted and o2 is not able to reach animals and hence the demand of biochemical oxygen is very much

Explanation:

Answer 2

river with high BOD (Biochemical oxygen demand) value is.....

1) highly polluted

Explanation:

• in the presence of high pollution there are a large number of organic products which are present in the water. These products are broken down by bacteria and other microorganisms.This requires a large amount of oxygen. Finally all the oxygen which are present in the water body is used for this purpose and it present in the death of a large number of Aquatic species.

To know more about biological oxygen demand,

What is meant by biological oxygen demand? - Brainly.in

https://brainly.in/question/2660983