Root hairs function to
a. decrease surface area of roots for increased water uptake.
b. increase surface area of roots for increased water uptake.
c. decrease surface area of roots for decreased water uptake.

Root hairs function to increase surface area of roots for increase water and mineral uptake. They are also called as absorbent hair, as they are extensions of the roots and invisible to the naked eyes. The best answer to the question is letter b.

Perform surgeries is the correct answer.