- Roots are the only organs in a plant that need water.?

No

Explanation:

But they are the only part of plants that absorb water

Explanation:

root, in botany, that part of a vascular plant normally underground. Its primary functions are anchorage of the plant, absorption of water and dissolved minerals and conduction of these to the stem, and storage of reserve foods.

the answer is 100% density i've answered this question before and done the quiz myself.