c. The diagram below is an illustration of a section through the soil. Study the diagram carefully and answer the questions that follow og 0 -IH i. What does the diagram represent? ii. Name the parts labeled I, II, III and IV iii. Which layer supports plant growth? iv. Which of layer contains organic matter? v. Which layer does not retain much water? vi. What is the effect of heavy rainfall on the part labeled I? 2 marks 4 marks 1 mark 1mark 1 mark 1mark​