Concept:A river's stage is identified by its slope, valley shape, and erosional features.
Explanation:River Aboye has a steep slope.
A steep gradient causes the river to cut downward rapidly into its bed.
This creates a narrow, V-shaped valley rather than a wide, flat flood plain.
Youthful rivers also lack the meanders and broad valleys found in mature or middle-stage rivers.
Because the river is still actively deepening its channel and has not yet developed a smooth, graded profile, it is at its youthful stage.
Answer:B. Youthful stage.
