Answer: The correct answer for the fill in the blank is D) Esophagus.
The digestive system is comprised of the gastrointestinal tract ( GI tract) and the accessory organs like liver, pancreas, and gallbladder.
The GI tract starts from the mouth and ends in the anus. This is a long twisting tube in which the hollow organs are joined. The hollow organs which are the part of the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus.
Food travels from the mouth to the stomach via a hollow tube-like structure which is called as Esophagus. Food is swallowed through the esophagus with the help of muscular movements called as peristalsis.
