Question

which word describes a depressed area of land that has been drained by a river?
gulf
canyon
basin
mouth

Explanation:

• A "gulf" is a large inlet of the sea, not related to a river - drained land area.
• A "canyon" is a deep valley with steep sides, usually formed by river erosion but not specifically a depressed area drained by a river in the described sense.
• A "basin" is a depressed area of land that is drained by a river (or river system), matching the description.
• A "mouth" of a river is where the river meets a larger body of water, not a depressed land area.

Answer:

C. basin