Answer:
The correct answer would be a. Transport of water and minerals from the roots to the shoot system.
The xylem is a type of transporting tissue present in the vascular plants.
It forms the continuous conducting channels which reach all parts of the plants.
The main function of the xylem is to transport water and soluble nutrients unidirectionally to the stem and leaves from roots.
Transpiration pull helps in this passive transport of water from roots to the leaves.