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What causes snowfall

This question belongs to Geography Atmosphere
Atmosphere
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What causes snowfall?

Answer & Solution
Correct Answer: Option A
When condensation takes place below 0° C and precipitation occurs in the form of flakes causes snowfall. If the humidity below the cloud base is low, the crystals may evaporate after leaving the cloud and so never reach the ground. If the temperature at the cloud base and just below it is close to zero, the snow crystals will tend to aggregate and form snowflakes.
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