World Geography
The periodic rise and fall of the sea level on the earth, gives rise to tides. This is related to

the position of the moon with reference to the earth and the gravitational pull exerted mainly by the moon and partly by the sun
ultraviolet rays from the sun
None of these
infrared rays from the sun

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

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

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World Geography
The rate of infiltration normally declines rapidly during the early part of rainstorm event and reaches a constant value after several hours of rainfall. The factors responsible for this phenomenon are I. the filling of fine soil pores with water, which reduces capillary forces II. moistened soil, clay particles to swell and reduce the size of pores III. raindrop impact breaking up with soil clumps, splashing fine particles into pores

I, III
II, III
All of these
I, II

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