What is the extreme northern vegetation zone in Nigeria, found along the borders of Borno, Yobe, and Sokoto, characterized by short thorny shrubs?
Answer and explanation
Correct answer: C. the Sahel Savanna
- Step 1: The Sahel Savanna occupies the southernmost fringe of the Sahara transition in northernmost Nigeria. Step 2. Rainfall is less than 500 mm annually, supporting only sparse, short perennial grasses and thorny Acacia and Commiphora shrubs. Answer: the Sahel Savanna. Why not the others: Sudan Savanna receives 600-1000 mm; Guinea Savanna receives 1000-1500 mm; Derived Savanna is converted rainforest.
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