The correct answer is D. All of the above.
Xylem vessels are a type of water-conducting tube found in plants. They are made up of dead cells that have been hollowed out and joined together to form a long, continuous tube. Xylem vessels transport water and minerals from the roots to the leaves.
Phloem vessels are a type of sugar-conducting tube found in plants. They are made up of living cells that are connected by sieve plates. Phloem vessels transport sugar from the leaves to the rest of the plant.
Vascular bundles are a group of xylem and phloem vessels that are bound together by a layer of cells called the pericycle. Vascular bundles are found in the stems and roots of plants.
In plants, water and mineral salts from the soil are absorbed by the roots and transported to the leaves through the xylem vessels. In the leaves, the water and mineral salts are used in photosynthesis to produce sugar. The sugar is then transported to the rest of the plant through the phloem vessels.
The xylem and phloem vessels are part of the vascular system of plants. The vascular system is responsible for transporting water, minerals, and sugar throughout the plant.