What is the purpose of a root hair and what helps it carry out its function?

Explanation:

Root hair helps in absorption and this is enhanced by its large surface area. Water moves from the soil water to the root hair cytoplasm through osmosis. This is because osmosis allows for movement from a region of higher concentration which is the soil water to the region of low concentration which is root hair cell cytoplasm.

Root hairs absorbs water and mineral nutrients that are available in the soil and taking it up through the roots to the rest of the remaining part of the plants. Absorption is possible because of the large surface area the root air has.

a. by using fur or clothes to trap heat energy near the body