Question

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

decrease in density of water

increase in plants in the water

decrease in temperature of water

increase in organic matter in the water

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

Option D

Step-by-step 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