Concept:Agricultural development in West Africa is influenced by broad economic and social factors.Religious beliefs affect only specific farming practices, not the overall growth of agriculture.Explanation:Ignorance prevents farmers from using improved methods and modern inputs.Poor marketing lowers income, reducing motivation to produce more.Population size changes demand, labour supply, and pressure on available land.These three factors generally shape agricultural development across the region.Religious beliefs may guide choices like avoiding certain livestock.However, they do not broadly determine agricultural progress in West Africa.Therefore, religious beliefs are the factor that is not generally responsible.Answer:B. religious beliefs