Question

4. What must we keep in mind while using water?
5. What is water pollution?​

Answer 1

Answer:

4. The main thing we must keep in mind while using water is, the proper use of it for any work like agriculture, washing, cleaning etc.

5.Water pollution is the contamination of water bodies, usually as a result of human activities. Water bodies include for example lakes, rivers, oceans, aquifers and groundwater. Water pollution results when contaminants are introduced into the natural environment.

Explanation:

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Answer 2

Answer:

4.We should not waste water while using it BECAUSE IT IS A PRECIOUS THING

5.WATER which is wasted and using it in an harmful way is called water pollution.