Answer:
The correct option is c) animal wastes and fertilizers
Explanation:
Fertilizers can be described as chemicals which are used by farmers to enhance the production of their crops. Fertilizers contain toxic nitrogenous compounds which when dissolved in river become toxic for the aquatic life and pollute the river. The fertilizers are usually washed of into the rivers during flood or nay other circumstances.
Animal waste also contains toxic nitrogenous compounds which when washed off into the rivers pollute the rivers and seas.
