What is the primary role of the large intestine in digestion?

The primary role of the large intestine in digestion is to remove waste from the body. While it is involved in the absorption of water and certain electrolytes, its main function is to process the remaining indigestible food matter, turning it into feces which are then excreted from the body. The large intestine is crucial for maintaining the body's fluid and electrolyte balance, as it absorbs water from the waste material before it is expelled.

In contrast, the absorption of nutrients primarily occurs in the small intestine, making that function less relevant to the large intestine's main role. Digestion of proteins mainly takes place in the stomach and small intestine, where enzymes break them down into amino acids. The production of bile occurs in the liver and is stored in the gallbladder, playing a key role in fat digestion but not directly related to the functions of the large intestine. Thus, the correct answer highlights the large intestine's key function in waste removal in the digestive process.