Answer: A) conduction of water to the leaves
Step-by-step explanation:
Xylem is a group of vascular tissues which support the plant. It conducts water and nutrients from the roots to the upper parts of the plant. A xylem system consists of tracheids, parenchyma cells, vessels and woody fibers. Xylem provides water to the leaves which aid in the process of photosynthesis, as water is an essential reactant of the process of photosynthesis.