Concept:Cattle distribution in West Africa depends on grazing resources, animal health, and climate, while light plays a minor role.
Explanation:Cattle require adequate pasture for grazing, so the availability of pastures strongly influences their distribution across the region.
Diseases also affect cattle distribution because outbreaks can reduce survival rates and limit where herds can be kept successfully.
Rainfall influences the growth of vegetation and the supply of surface water, making it another key factor in deciding suitable cattle-rearing areas.
Light, however, does not act as a major limiting factor for cattle distribution in West Africa.
Hence, the factor that does not influence cattle distribution is light.
Answer:B. light