Plants absorb most part of water needed by them through their

The correct answer is (d). Root hairs are tiny, thread-like projections that extend from the root tips of plants. They are responsible for absorbing water and minerals from the soil. The other options are incorrect because they are not involved in water absorption.

(a) The embryonic zone is the region of the plant embryo that contains the cells that will eventually develop into the root, shoot, and leaves.
(b) The growing point is the region of the plant where cell division and growth occur.
(c) The zone of elongation is the region of the plant where cells elongate and differentiate.