Abyssal plains are very flat features that form when a. volcanoes spread lava on the ocean bottom. b. turbidity currents deposit sediments on the ocean floor. c. ocean waters flood plains on land. d. plates diverge on the ocean floor, causing seafloor spreading.
B. Turbidity currents deposit sediments on ocean floor. Abyssal plain is a flat seafloor area with a depth ranging from 3000 to 6000 m. The creation of abyssal plain is an end result of spreading of sea floor and melting of lower oceanic crust.