Final Answer:
The process of water moving down the side of a mountain should be labeled as C) Runoff. (option C)
Step-by-step explanation:
Runoff refers to the movement of water over the Earth's surface, and it is a key component of the water cycle. When precipitation, such as rain or snow, falls on a mountain, the water can flow downhill due to gravity. This flow of water over the land surface, picking up sediment and minerals along the way, is known as runoff. Runoff contributes to the formation of rivers and streams, playing a crucial role in the continuous movement of water through the water cycle.
In the water cycle, precipitation (option A) is the overarching term for any form of water, liquid or solid, falling from the atmosphere to the Earth's surface. While runoff is a component of the water cycle, it specifically refers to the surface flow of water. Infiltration (option B) involves the process of water seeping into the ground and becoming groundwater. Evaporation (option D) is the conversion of liquid water to water vapor from the Earth's surface.
Understanding runoff is essential in comprehending the dynamics of water distribution, erosion, and the formation of landscapes. It connects the various phases of the water cycle and highlights the interconnectedness of Earth's water systems, making it a significant aspect of geographical studies.(option C)