Why did uncertain rainfall become an economic risk in African pastoralism?

Correct answer: Because low rainfall could reduce grass, water and animal productivity

The direct answer is A: low or uncertain rainfall can reduce grass, water, and animal productivity. Pastoralists depend on natural grazing and water rather than fixed cultivated fields. Reasoning: uncertain rain means uncertain grass growth; less grass and water weaken animals; weak animals give less milk, meat, offspring, or sale value; income and food security then decline. Option A is correct because it links climate, natural resources, livestock health, and the household economy. Option B is wrong because rainfall does not always double livestock. Option C is wrong because pastoralism depends strongly on rain-fed grass and water. Option D is wrong because rainfall does not produce only minerals. The risk is economic because loss of animal productivity reduces both consumption and earnings. Exam cue: rainfall → pasture and water → animal health → income.