Question

Primary source of water is
A.Rivers
B.Groundwater
C. Lakes
D. Rainwater

Answer 1

Hint: There are various natural sources of water which are used by humans, for carrying out daily activities like drinking, washing, and cleaning purposes and also used by animals and birds for drinking purposes.

Complete answer:
Rainwater is known as the primary source of water which gets collected at rivers and lakes and some of this water is also available as groundwater, Rainwater is considered as the primary source of water because the lost water from other sources like river or lakes can easily be replenished by the Rainwater.

Option A: The water in the rivers is classified as surface water which is lost because of many reasons and this water is restored by the Rainwater Therefore, this is the incorrect option.

Option B: Groundwater is the water present below the surface of earth also known as a subsurface water source, Groundwater is filled by seeping of water from surface water sources. Therefore, this is the incorrect option.

Option C: The main difference between lakes and rivers is that river flows and lakes do not but the similarity is that both are surface water sources. Therefore, this is the incorrect option.

Option D: Rainwater is the main and primary source of water, water sources like rivers, lakes, ponds, and groundwater constantly lose water due to seepage and flow to the ocean or evaporation, and this water is then filled up by the rainwater. Therefore, this is the correct option.

Hence, the correct answer is option (D)

Note: In some regions such as the middle east regions, the seawater is desalinated using techniques like reverse osmosis to make drinking water from seawater. This technique is a useful technique to get drinking water from sea but the process is very expensive.