Which fats are liquid at room temperature and found in vegetable oils, nuts, and seeds?

• A. Polyunsaturated fats
• B. Saturated fats
• C. Unsaturated fats
• D. Trans fats

Answer: (C)

Fats that are liquid at room temperature are unsaturated fats. Their fatty acid chains contain one or more double bonds, which create kinks that prevent tight packing, so they stay fluid rather than becoming solid. Vegetable oils, nuts, and seeds are rich in these fats, including monounsaturated and polyunsaturated types. In contrast, saturated fats have no double bonds and pack tightly, making them solid at room temperature (like butter). Trans fats are usually industrially created through hydrogenation and aren’t the typical fats you’d associate with nuts, seeds, or most vegetable oils. So the fats described—liquid at room temperature and found in those foods—are unsaturated fats.