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Why can local humidity be higher in a forest than in an open dry area?

Answer and explanation

Correct answer: Because transpiration adds water vapour to the air.

Direct answer: A is correct. Plants absorb water through their roots and release part of it as water vapour through tiny openings in their leaves; this process is called transpiration. A forest also contains many leaves and often has shaded, sheltered air, so vapour released by vegetation can raise local moisture, especially when ventilation is limited. This describes a local or microclimatic effect, not a claim that every forest is always more humid than every dry area. B is wrong because transpiration adds vapour rather than destroying it. C is wrong because forest temperatures vary with season, time, and location and are not always zero. D is wrong because leaves do not eliminate air pressure. Memory cue: vegetation exchanges water with the atmosphere—roots take it up, leaves release vapour.

Related tags

TranspirationHumidityForest MicroclimateEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeographyClass 12 Mcq

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