Xylem is the plant structure that helps transport water from the roots to the leaves and other parts of the plant.
The correct option is b.
Xylem is one of the transport systems of the plant which transport water from the root to other parts of the plant.
The other transport system is the phloem, which transports nutrients and water from the plant to its roots.
Thus, the correct option is B, Xylem.
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