| Which of the following constitute the favourable condition for formation of delta? |
| 1. Considerable erosion in upper course of the river. |
| 2. Presence of tidal current at the mouth of delta. |
| 3. Shallow sea at the mouth of river. |
| 4. Existence of lake in course of the river. |
| Select the correct answer using the codes given below. |
A) 1 and 2
B) 1 and 3
C) 1, 2 and 3
D) 2 and 3
Correct Answer: B
Solution :
[b] Deltas are wetland that form as rivers that empty their water and sediment into another body of water, such as an ocean, lake or another river. Delta formation requires considerable erosion in upper course of the river and shallow sea at the mouth of the river. Presence of ocean current may wash out the deposits; hence are not favourable for delta formation. Existence of lake in course of river too does not contribute in delta formation.
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