World Geography
The typical soil of tropical region, formed by the weathering of laterite rock, which promotes leaching of the soil is

red and yellow soil
laterite soils
black soil
peat and marshy soil

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

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

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