Correct Answer: Small Intestine

Solution : The correct option is the Small intestine .

Villi are tiny, finger-like extensions that line the small intestine's walls. They are composed of specialised cells and are surrounded by even smaller projections known as microvilli. The surface area of the intestinal lining is considerably increased by villi, enabling efficient absorption of nutrients from digested food into the bloodstream. This improves the small intestine's digestion and absorption capacity.