Q. Which of the following causes Frontal Rain?
Answer: Cyclonic activity
Notes: Frontal rainfall is a type of precipitation which occurs when a warm air mass and a cold air mass meet. Extra-tropical cyclones form as waves along weather fronts before occluding later in their life cycle as cold core cyclones. Cyclogenesis is the development or strengthening of cyclonic circulation in the atmosphere (a low pressure area).

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Question Number: 66 in Climatology - Air Masses, Fronts, Cyclones and Related Phenomena in above course in App.