What is the primary function of hyaluronic acid in the human body, and how does it contribute to tissue hydration and repair?
A) It acts as a lubricant in joints and contributes to skin hydration and wound healing.
B) It serves as an energy source for cells and aids in metabolic processes.
C) It functions as an enzyme to break down proteins in the digestive system.
D) It provides structural support to cell membranes and helps in cellular communication.