Which of the following organs is described as a pear-shaped sac that stores bile?

The gallbladder is a small, pear-shaped organ located beneath the liver that plays a crucial role in digestion. Its primary function is to store and concentrate bile, which is a digestive fluid produced by the liver. When you eat fatty foods, the gallbladder releases bile into the small intestine to help break down fats, aiding in the digestion process. Understanding the gallbladder's function highlights its importance in regulating digestion, particularly in response to dietary fat intake, making it essential for overall digestive health.

The other options represent different organs involved in digestion but do not fulfill the specific function of storing bile. The stomach is primarily responsible for breaking down food using gastric juices, the pancreas has a role in insulin production and enzyme secretion for digestion, and the liver, while it produces bile, does not store it. Consequently, it is the gallbladder that serves the specific purpose of storing bile, affirming its identity as the correct answer.