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

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
infrared rays from the sun

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World Geography
The initial increase of magnetic field in magnetic storms is caused

when the gust wind itself engulfs the magnetosphere
None of these
when the shock wave, associated with the gusty solar wind, compresses the magnetosphere
when there is a large decrease in field intensity

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