Which of these is a way to conserve freshwater
a. build thermal power plants
b. add water features to private gardens
c. install low-flush toilets in homes
d. avoid drip irrigation system on farms

Installation of low flush toilets in home is considered as way to conserve the fresh water.

C

Explanation:

Fresh water must be conserved as its availability is very low.

All the process which utilizes water must be checked and ensured that water is judicially used.

Among the given option, the best way to conserve the fresh water is to install low-flush toilets at homes.

The low flush toilets help in conservation of high amount of water as it reduces the water usage from 3.5 - 7 gallons to 1.6 gallons per flush.

This helps in high water conservation.