Question

An overflow of water that submerges land is called________
A. Drought
B. Flood
C.Avalanche
D.All of these

Answer 1

Hint: A major adverse effect that is caused due to natural causes like floods, earthquakes, forest fires , volcanic eruptions and several others are known as natural disasters. Natural disasters can have disastrous consequences in areas that contain vulnerable populations who might not have proper equipment to deal with hostile environments.

Complete answer: An overflow of water that submerges land which is usually dry is called flood. Floods cause major concern in agriculture,public health and civil engineering. Floods are considered the most common second natural disaster in the world after wildfires. Floods can also occur if the flow of the river exceeds that of the river channel.
Looking at the options:
Option A: Drought is a condition when there is a prolonged shortage of water supply from the atmosphere in the form of rain or snow, groundwater or surface water. Hence this is incorrect.
Option B: Flood is caused when the otherwise dry land is also submerged under water due to its overflow. This is the correct answer.
Option C: Avalanche is caused when a mass of rock, snow or ice collapses from a mountain. Hence this is incorrect
Option D: This is incorrect because A & C are wrong.

Thus, Option B is the right answer.

Note: Although rivers cause major damage with the occurrence of floods, it is very difficult to eliminate its importance and move away from them because of the fertile land and easy and cheap access to transportation. Floods can be controlled by following simple measures such as afforestation,man made channels to divert flood water, construction of dams and reservoirs to hold extra water when floods are caused.