What are the three factors which determine the thickness of sediments on the abyssal plains?

The thickness of sediments on abyssal plains is primarily influenced by the availability of sediment supply from continental margins, the rate of sedimentation, and the age of the oceanic crust. Sediment supply varies with geological activity and river input, while sedimentation rates can be affected by ocean currents and biological productivity. Additionally, older oceanic crust may have thicker sediments due to longer exposure to sedimentation processes over time.