Which natural phenomenon leads to the formation of rain clouds?

The formation of rain clouds primarily involves the process of evaporation of water bodies. When water from oceans, rivers, and lakes evaporates due to heat, it transforms from a liquid into water vapor, which is a gas. This water vapor rises into the atmosphere, where it cools and condenses into tiny water droplets when it reaches higher altitudes, forming clouds. If the conditions are right, these droplets combine and grow larger, ultimately leading to precipitation in the form of rain.

While other processes mentioned, such as freezing at high altitudes and increased solar radiation, may impact weather and cloud formation, they do not directly lead to the initial formation of rain clouds as effectively as evaporation does. Cloud dissipation is the process of clouds breaking down, which is the opposite of cloud formation. Thus, the key to rain cloud formation centers around the evaporation of water bodies, making it the correct choice for this question.