Question

question: which of these separate drainage basins? answer options: select one of four waters valleys rivers divides

Explanation:

Drainage divides (or just divides) are topographic features that separate different drainage basins by directing the flow of water to different river systems. Waters are part of the basin, valleys are formed by erosion (including from rivers in basins), and rivers are within a drainage basin. So Divides are what separate drainage basins.

Answer:

D. Divides