Convectional rainfall is a type of rainfall that is caused by the heating and cooling of air near the Earth`s surface. This process typically occurs in the afternoon in equatorial regions, where the sun`s rays are strongest. Therefore, statement 1 is correct.
Convectional rainfall is characterized by its short duration. This is because the process of convection involves the rapid upward movement of warm air, which quickly cools and condenses into rain clouds. Once the rain clouds have released their moisture, the rainfall typically stops. Therefore, statement 2 is correct.
Convectional rainfall occurs through cumulonimbus clouds. Cumulonimbus clouds are tall and thick clouds that are formed as a result of convection. These clouds have the ability to produce heavy rainfall, thunderstorms, and even hail. Therefore, statement 3 is correct.
Based on these explanations, the correct answer is option 1: 1, 2, and 3.
The provided answer is correct and does not require any changes or alerts.