The part of the plant that transports water and nutrients from roots to stem and leaves is the xylem.

Here's why:

* Xylem is a type of vascular tissue that forms a network of tubes throughout the plant.

* It's made up of dead cells with thick, rigid walls, forming a strong and efficient pipe system.

* Water and dissolved minerals are absorbed by the roots and travel up the xylem to the rest of the plant, including the stem and leaves.

Think of the xylem like the plumbing system of the plant!