Final answer:
The angle of repose is closely associated with talus and describes the maximum stable angle at which loose materials can accumulate without moving downslope.
Step-by-step explanation:
The term "The angle of repose" is most closely associated with option A) talus. The angle of repose refers to the maximum angle that a soil, sediment, or other loose material can be piled up or accumulate without moving downslope. This angle varies for different types of materials and moisture conditions. For instance, sandstone has an angle of repose of about 30°, while shale's angle of repose is higher, over 40°. Therefore, when considering sediment accumulation, such as talus at the base of rock faces or mountain slopes, the angle of repose is a critical concept that determines the stability and angle at which these materials will rest.