Question

Which of the following is a way to use water economically?
A. Construction of bawris
B. Rain water harvesting
C. Drip irrigation
D. Infiltration

Answer 1

The following methods discussed above are used to utilize water during carrying out agricultural practices such as growing various kinds of crops or carrying out day to day processes. These are some methods used traditionally to conserve water and utilize it later for cultivating the land.

Complete answer:
One such traditional practice listed above is construction of bawris which is actually constructing deep wells followed by steps made by mud deep in the ground. These bawris would get filled with water whenever there is rain and hence was used by villagers to carry out their daily chores and to collect water. But constructing bawris fell out of practice as the garbage got collected in them but are still made in some places.
Rain water harvesting is collecting and storing rain water and unlike bawris it is more of a personal method to utilize water, people collect rain water on the roofs of their house which is connected to a tank where it's collected through a pipe.
Drip irrigation is the most economical way to use water since all the nutrients of the water are preserved and are directly used by the roots of plants hence minimizing the evaporation, it has a very low cost of operating such a system. It is an agricultural practice used while agriculturing it allows drip wise flow of water and hence saving the water to utmost level.
Infiltration is another process by which water enters the soil to enrich it via the ground surface. The source of water in this process comes from precipitation and gets added into the groundwater table after getting filtered through the porous and non porous levels of soil which includes layers of rocks as well.

**Therefore the correct option is C.

Note:**
One may see some of these processes being carried out in villages to collect water and use it in future. One may observe most of these methods have the same source of water that is the rain water. Since it is a natural source of water that can never be depleted hence which makes these methods economical.