Question

Swamps are seen in the Siberian rivers because ________________.

A

Freezing of the river near the mouth prevents water to flow to the sea

B

Rivers are too narrow

C

Rivers are heavily drained by the large network of canals

D

Railway bridges built across the rier obstruct the flow

Easy

Solution

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Correct option is A)

Swamps, wetland ecosystem are characterized by mineral soils with poor drainage and by plant life dominated by trees. Swamps are found throughout the world. 

They exist in areas with poor drainage and sufficient water supply to keep the ground waterlogged, and they have a high enough supply of minerals in the water to stimulate decay of organisms and prevent the accumulation of organic materials. 

They are often found in regions of low relief associated with rivers that supply the water.

Swamps are seen in the Siberian rivers because freezing of the river near the mouth prevents water to flow to the sea.

Hence, option, A is the correct answer.

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