C) absorption; villi, blood vessels, lymphatic vessels
Explanation:
The villi are many small folds in the intestine (0.5 to 1.6 mm in length) that increase the surface area and thus maximize the absorption of foods. The villi transport nutrients from food to the capillaries and lymphatic vessels which are found close to its surface. The blood vessels support the tissues of the small intestine and they required to transport the nutrients to the body. Moreover, the lymphatic vessels are involved in nutrient absorption by returning the interstitial fluid to the bloodstream.
