Concept:A soil profile shows the layers of soil, which helps farmers understand soil properties.Explanation:A soil profile provides useful information about the different soil horizons.From the profile, a farmer can judge soil fertility based on the topsoil and organic matter.It also gives clues about water-holding capacity by showing soil texture and structure.The profile reveals the depth of the soil before reaching bedrock or hardpan.Therefore, statements I, II and III are correct.Answer:D. I, II and III