Why does absorption of digested food occur mainly in the small intestine?

Explanation

Absorption of digested food occurs mainly in small intestine because:
a] Chemical and mechanical digestion of food reaches to completion in small intestine
b] The finger like projection called as villi which in turn serve to increase the surface area to facilitate maximum absorption of digested food.
c] Wall of small intestine is richly supplied with blood vessels which take the absorbed food to different body part.