Why is the structure of a root hair considered suitable for absorbing water from the soil?

The root hair is suitable for absorbing water from the soil in the following three ways:

1. The numerous root hairs provide a large surface area. More the surface area, greater is the absorption.
2. Root hairs contain cell sap which is of a higher concentration than the surrounding soil water.
3. The cell wall is freely permeable, i.e., permits movements of all types of substances. But the cell membrane is semi-permeable. It allows only some substances to pass through it.