The ocean floor is uneven and has distinct landforms similar to those on land. It includes the continental shelf, an important shallow zone rich in fish and minerals; the continental slope, a steep edge marking the continent’s boundary; abyssal plains, flat deep-sea areas; mid-oceanic ridges, active volcanic regions; and marine trenches, the deepest parts like the Mariana Trench. Marine deposits come from rivers, volcanoes, and human waste, affecting ocean life and ecosystems