Correct option: D. Rejuvenated stream
The mature stream have medium velocity and the canyon walls are not steep.
The old stream have water moving at very slow pace and it has wide floodplain.
The youthful stream have narrow and steep canyon walls and the water is fast moving.
The rejuvenated stream is formed due to uplift of land raised by tectonic activity. The water flows very quickly from high elevation to low elevation and the water moves rapidly. It also have steep canyon walls.
