Xylem is a type of complex tissue in plants for upward conduction of w

Xylem is a type of complex tissue in plants for upward conduction of water. Which one of the following xylem tissues consists of living cells?

Tracheid
Vessel
Xylem parenchyma
Xylem fibre
This question was previously asked in
UPSC CDS-1 – 2023
Xylem is composed of four main types of elements: tracheids, vessels, xylem parenchyma, and xylem fibres. Among these, only xylem parenchyma cells are living cells.
Tracheids and vessels are the main water-conducting elements and are dead, hollow tubes at maturity. Xylem fibres are typically dead and provide mechanical support. Xylem parenchyma cells are involved in storage of food materials (starch, fats) and lateral conduction of water and minerals.
Phloem, another complex plant tissue, is responsible for the translocation of sugars and also contains living cells, such as sieve elements and companion cells.