Final answer:
The occurrence of deposition is best illustrated by the glacier ending in the water, as glaciers are agents of deposition when they deposit sediment at their termini.
Step-by-step explanation:
The evidence in the photo that best illustrates the occurrence of deposition is the glacier ending in the water. Glaciers are powerful agents of erosion and deposition. When they end in bodies of water, they often deposit sediment and rocks they have picked up along their journey in a process known as glacial deposition.
These materials can accumulate to form various landforms such as moraines, drumlins, and outwash plains. The color of the rock formations typically provides insights into the ancient environments where the sedimentary rocks were deposited and is less directly indicative of the active process of deposition.
For example, deep marine environments are typically associated with black-colored sedimentary rocks due to the lack of oxygen, while red-colored rocks may imply an oxygen-rich continental environment like rivers or deserts. However, it is the actual positioning of the glacier at the end of the water in the photo that clues us into the fact that deposition is actively occurring.