4 from what I read but are you sure you didn't leave anything out?
Continental rise
Continental margin is composed by three parts, the
continental shelf, continental slope and continental rise. The continental
shelf is located near the continental crust just a few kilometers and the
middle portion of the margin, continental slope and continental rise which is
2,000 – 3,000 deep near the ocean floor. In the lithosphere, between continental
crust and oceanic crust the continental rise is the boundary between these two.
The continental rise is said border to which extends to abyssal plain or the
ocean floor.
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