What condition is characterized by a disturbance of digestion?

Dyspepsia is the correct condition characterized by a disturbance of digestion. It often refers to a range of symptoms that include discomfort or pain in the upper abdomen, bloating, and nausea. Dyspepsia is not a specific disease but rather a cluster of symptoms that can arise from various underlying conditions affecting the digestive system, such as acid reflux or peptic ulcers.

The other conditions mentioned have more specific definitions. Gastritis refers to inflammation of the stomach lining, which could lead to digestive disturbances but is not classified broadly as a disturbance of digestion in the way dyspepsia is. Colitis involves inflammation of the colon, and while it can disrupt digestion, it is focused on the large intestine. Constipation is related to the difficulty in passing stool and is considered a form of digestive disturbance but does not encompass the broader range of digestive symptoms that dyspepsia does. Thus, dyspepsia is the most accurate answer reflecting a general disturbance of digestion.