The best answer to the question "Which is an important river valley in the Sahel?" is Niger.
1. The Niger River is a significant river that flows through the Sahel region of Africa.
2. It plays a crucial role in providing water for irrigation, drinking, and agriculture in the arid Sahel.
3. The Niger River Valley is essential for supporting livelihoods and ecosystems in the region.
4. Its waters sustain a diverse range of flora and fauna along its course.
Therefore, the Niger River is an important river valley in the Sahel due to its vital role in sustaining life and ecosystems in this semi-arid region.
