Final answer:
Citrus fruits like grapefruit, oranges, and lemons are rich in vitamin C and citric acid, offering health benefits and a signature sour taste.
Step-by-step explanation:
Citrus fruits, including grapefruit, oranges, and lemons, are notable for their high concentrations of vitamin C (ascorbic acid) and citric acid, both of which are important nutrients with antioxidant properties.
These acids contribute to the tart and sour flavors characteristic of these fruits.
These healthful fruits are not only essential for a balanced diet but are also used in a variety of culinary contexts, ranging from fruit sauces and jellies to beverages and baked goods.