Give reason:

Convectional rainfall is also called 4'0 clock rain.

Convectional rainfall occurs or develops as warm and moist air rises up and condenses. When the air near the earth surface is heated, it rises and expands. This heating results in the formation of convectional air currents which results in convectional rainfall.

The term convection means the vertical movement of heat due to solar radiations. The process of convection is more intense during the daytime or in the late mid-afternoon which is the warmest part of the day. The word 4’0 clock has no technical denotation but is just associated with the time at which the rate of convection is fastest.