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

Avulsion
Abrasion
Attrition
Corrasion

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World Geography
What are secondary mineral deposits formed in caves called?

Pyroclastic debris
Speleogenesis
Speleothems
Ejecta Blanket

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World Geography
The term 'flora' in the context of natural vegetation refers to

a large tract covered by trees and shrubs and its administration for assessing economic benefits
role played by species of animals in the maintenance of ecological balance
assemblage of plant species living in association with each other in a given environmental frame
plants of a particular region or period, listed by species and considered as a group

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

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

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