What is rainwater harvesting?

The process of collecting rainwater and utilizing it is known as rainwater harvesting. For rainwater harvesting, its setup can be installed in homes, schools, buildings, and many other places. It is a very innovative method to save rainwater. The collected water can be used throughout the year. In places where water is scarce, people practice rainwater harvesting.

Rainwater harvesting does not involve collecting tap water. So it is an incorrect option.

Therefore, the correct answer is an option (A).