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What can cause more rainfall in one region and less in another?

Answer and explanation

Correct answer: Position of mountains and wind direction

The direct answer is B, Position of mountains and wind direction. Rainfall depends strongly on how moist winds move and what landforms they meet. Step by step: winds may carry moist air; when that air reaches a mountain, it is forced to rise; rising air cools; water vapour condenses into clouds and rain on the windward side; after crossing the mountain, the air is drier, so the leeward side may receive less rain and form a rain-shadow area. Option B is correct because both mountain position and wind direction decide where moist air rises and where rain falls. Option A, saying all regions have the same latitude, does not explain the different rainfall pattern and is not necessarily true. Option C, saying all places have the same altitude, removes a possible difference rather than explaining it. Option D, language similarity, has no physical role in rainfall. The exact result also depends on moisture, season and other conditions, but B is the relevant answer. Memory cue: moist wind plus mountain gives rising air, rainward side and possible rain shadow.

Related tags

ClimateRainfallRelief-Wind

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