The correct answer is option 4: Liver. The liver plays a crucial role in carbohydrate metabolism and storage. After digestion, carbohydrates are broken down into glucose and then transported to the liver. The liver then converts excess glucose into glycogen, which is stored for later use. This glycogen acts as a reserve of carbohydrates that can be quickly broken down into glucose when the body needs energy. The liver is the primary site for glycogen storage in the human body. Additionally, the liver also regulates blood sugar levels by releasing glucose when needed. Therefore, option 4, the liver, is the organ that stores carbohydrates as glycogen in the human body. Alert - correct answer should be option 4: Liver.