Question

The amount of dissolved oxygen in water may decrease because of the

Answer 1

I think , The amount of dissolved oxygen in water may decrease because of the increase in organic matter in the water.

Answer 2

Answer:

Option D

Explanation:

Increase in organic matter in the water will lead to production of microbes, algae, and all other  water species  by feeding  on increased organic matter. This organic matter will act as  food for the species living under the water.

With increased food supply, the population of water species will also increase which in turn will consume more and more dissolved oxygen from water thereby making it devoid of oxygen.

Hence, option D is correct