The correct answer is: A. Large intestine.
The large intestine is the final part of the digestive system. It is about 5 feet long and 3 inches in diameter. The large intestine absorbs water and salts from food waste, and it stores food waste until it is eliminated from the body.
The large intestine is home to a large number of bacteria. These bacteria help to break down food waste and produce vitamins that are essential for human health. Some of the vitamins that are produced by bacteria in the large intestine include vitamin K, vitamin B12, and biotin.
The bacteria in the large intestine also help to protect the body from harmful bacteria. They do this by competing with harmful bacteria for food and by producing substances that kill harmful bacteria.
The bacteria in the large intestine are important for human health. They help to break down food waste, produce vitamins, and protect the body from harmful bacteria.
The small intestine is the part of the digestive system that is located between the stomach and the large intestine. It is about 20 feet long and 1 inch in diameter. The small intestine is responsible for absorbing nutrients from food.
The stomach is a muscular sac that is located in the upper abdomen. It is about 10 inches long and 3 inches in diameter. The stomach is responsible for breaking down food and mixing it with digestive juices.
None of the above is not the correct answer.