Fog Often Lingers in River Valleys Because

question 58

Multiple Choice

Fog often lingers in river valleys because

• A)the water in the river cools off faster at night than the land does.
• B)cold air rises from low areas such as river valleys.
• C)some evaporation may occur from the river,thereby supplying moisture to the cooler atmosphere.
• D)water vapour drains downslope into the valley.
• E)sublimation chills the valley.

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