World Geography
Which among the following statements is correct about Mesa?

It is a secluded hollow
It is an elevated area of land with a flat top and sides that are usually steep cliffs
It is a narrow pass or gorge between mountains or hills
It is a small hill

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

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

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