Explanation:

- Cortex: This is the outer layer of the stem or root of a plant, located between the epidermis and the vascular tissue. It mainly stores food and provides structural support but does not transport water.

- ? Xylem: This is the tissue responsible for the transport of water and minerals from the roots to the rest of the plant. It consists of vessels and tracheids.

- Stele: This is the central part of a plant root or stem, containing the vascular tissue. It involves tissues like xylem and phloem, but is not specifically responsible for transport.

- Phloem: This tissue primarily transports sugars and nutrients made by photosynthesis from leaves to other parts of the plant.

The correct option is 2 – Xylem.