The three causes of water scarcity in our country are
(i) Rapid urbanisation.
(ii) Increased number of industries.
(iii) Population explosion.

A - Melting, B - Boiling, C - Freezing, D- Condensation

The complete table is given below

Plants lose water in the form of water vapour by the process of transpiration. So, forests contribute a lot of water vapours formation which make clouds.
Thus, plants help to revive water cycle.

Traditionally in ancient times, people made bawris to collect rainwater in the old buildings. We still use these structures and are reviving them to harness rainwater

The factors responsible for depletion of water table are as follows:
(i) Increasing population It decreases the open area for seepage of water into the grounds,
(ii) Increasing industries Most of the stages of manufacturing processes in industries require water. If the number of industries increases, then the water required by them will also increase and will lead to the depletion of water table.
(iii) Agricultural activities The water for agriculture is mainly utilised from groundwater, rainwater and canal water. The increased population causes pressure on agricultural practices. This inturn causes increase the use of groundwater and leads to the depletion of water table.

Heavy rainfall is not responsible for water shortage, rather it increases water table.

The actual amount of water available for human use is very little, i.e. approx 0.0006 % of all water found on the earth.

No, we cannot keep on drawing water. It causes the depletion of water table.

About two-third of the earth's surface is covered with water

The excessive use of water leads to water scarcity in an area.

The reservoir of dam or river can release water at our will. We can divert the flow of water at desired places where it is really needed and we can manage water resource effectively.

This means if you have water, you can think of future, i.e. no life is possible without water.

(a) Minimum wastage of water is called water management.
(b) We should save water to prevent water crisis.
(c) Shishir is sincere, responsible and has capability of applying knowledge practica

(a) Large scale construction (b) Deforestation.
Large scale construction It is main cause of water table lowering because it utilises large amount of water at the time of construction. Most of the time, it is digged water table.
Secondary, when ground surface becomes cemented. It does not allow seepage of rainwater into deeper layers, so rainwater goes waste as run off water and cannot replenish the water table of that particular place.
Deforestation Plants transfer huge amount of water in the form of water vapours. So, when forests are cut down, we interrupt in the process of water cycle of that area. So, no rain occurs at that place and it gradually turns into desert area.

(a) Sachin has build up cemented drainage channels in the elevated area and tanks where these channels will collect water.
(b) Sachin is planning to harvest rainwater.
(c) Sachin will educate people to use water judicially in the following way
(i) Use mug for brushing, shaving and bathing.
(ii) Water plants with drip irrigation.
(iii) Use and reuse water in home activities.