The part of a plant that collects water from the ground is the roots.

Here's why:

* Roots are usually underground and have a large surface area. This helps them absorb water and minerals from the soil.

* Root hairs, tiny extensions of the root cells, increase the surface area even further, making absorption more efficient.

* Once the water is absorbed, it travels up the plant through the xylem, a specialized tissue in the roots, stem, and leaves.