World Geography
What is process where the river abandons its old river channel and forms a new one called?

Abrasion
Avulsion
Attrition
Corrasion

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World Geography
The main objective of multi-purpose river projects are

flood controls and making rivers navigable
All of these
extension of irrigation facilities by constructing dams to store surplus water during the rainy seas
power generation by constructing hydro power stations

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