The correct answer is option 2: Phloem. The phloem is a specialized tissue in plants that transports food, such as sugars and amino acids, from the leaves to other parts of the plant, including the roots and fruits. It is responsible for the movement of organic nutrients in a process known as translocation. The cells in the phloem, called sieve tube elements, are connected end-to-end to form a continuous tube that allows the flow of food substances throughout the plant. In contrast, the xylem, which is another type of plant tissue mentioned in option 1, is responsible for the transport of water and minerals from the roots to the rest of the plant. Chloroplasts, mentioned in option 3, are responsible for photosynthesis and are not directly involved in transportation. Therefore, the correct answer is option 2: Phloem.