Which of the following is an organ?

The liver is an organ. An organ is a group of tissues that work together to perform a specific function in the body. The liver is an essential organ located in the upper right-hand side of the abdomen, just below the diaphragm. It plays a vital role in metabolism, detoxification, digestion, and the production of various hormones and proteins. The liver produces bile, which helps to digest fats and absorb fat-soluble vitamins. It also helps to regulate the levels of glucose, cholesterol, and other substances in the blood. The liver is a vital organ for maintaining good health, and any dysfunction or damage to it can have serious consequences for the body.