Concept:Commercial farming is agricultural production on a large scale, mainly for sale and profit.Explanation:Option A describes subsistence farming because it focuses on family consumption.Option C also refers to family consumption, which is not the purpose of commercial farming.Option D mentions the type of labour used, but labour source is not the defining feature of commercial farming.Commercial farming is best described as large-scale production aimed at selling the output in the market.Answer:B. large scale agricultural production for sale