On a sunny day at an open market a vendor, Ms Milly, occasionally sprinkles water on her wilting lettuce. During the day Ms Milly’s lettuce are firm and ready for sale. (i) Distinguish between “diffusion’’ and “osmosis”. (2 mark) (ii) Identify the process that resulted in Ms Milly’s wilting lettuce becoming firm. (1 mark) (iii) Explain how the process identified in (b) (ii) kept the lettuce firm. (2marks) (iv) Suggest a suitable method, other than sprinkling, that a consumer could use to keep the lettuce firm.