Question

RIGHT OR WRONG. 1. In a water bodies polluted by metal compounds the metal accumulator inside the bodies of fish.
2. Algal bloom provides a rich source of oxygen for the water body that helps aquatic plant and animals.
3. Waste water from agricultural land do not cause water pollution.
4. In biochemical treatment of water,oxygen is supplied to water by injecting air through water or with the help of algae which can produce oxygen by photosynthesis.
4. Water pollution is caused by the smoke given out by factories.​

Answer 1

Answer:

(1) is incorrect

(2)is correct

(3)is correct

(4) I don't know...sry.

(5) is correct