The part of a plant that takes in water and nutrients from the soil is the root.

Here's why:

* Roots are specialized structures that grow underground. They have a large surface area with tiny root hairs that absorb water and dissolved nutrients from the soil.

* Stems support the plant and transport water and nutrients from the roots to the leaves.

* Leaves are responsible for photosynthesis, where the plant uses sunlight to make its own food.

* Flowers are involved in reproduction, producing seeds for new plants.