Final answer:
The continental slope tends to host the coarsest sediments in marine depositional environments.
Step-by-step explanation:
The marine depositional environment that tends to host the coarsest sediments is the continental slope. In this environment, sediments accumulate as a result of gravity-driven processes such as underwater landslides and turbidity currents. These processes transport and deposit larger, coarser sediments compared to the continental shelf or deep marine environments.