Where do trenches not exist the steep continental slope merges into a more gradual incline known as the continental what?

Where trenches do not exist, the steep continental slope merges into a more gradual incline known as the continental rise. This region is formed by the accumulation of sediments that have been transported down the slope, creating a more gentle transition to the ocean floor. The continental rise typically features a broad, gently sloping area that extends toward the abyssal plain.