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

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

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World Geography
Which among the following statements is not correct about Plunge pool?

It is created by the erosional forces of cascading water
It is a deep depression in a stream bed at the base of a waterfall
They occur at the mature stage of the river development
They are often very deep, generally related to the height of fall and the volume of water,

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