What type of fat usually remains liquid at room temperature and is mostly derived from plant sources?

The correct answer is unsaturated fats. These fats are typically liquid at room temperature and are primarily derived from plant sources such as oils (e.g., olive oil, canola oil, and sunflower oil). Unsaturated fats are classified into monounsaturated and polyunsaturated fats, both of which have been shown to have health benefits, including lowering the risk of heart disease when used in place of saturated fats.

In contrast, saturated fats tend to be solid at room temperature and are mostly found in animal products and certain plant oils, which can contribute to higher cholesterol levels in the bloodstream if consumed in excess. Trans fats, often found in processed foods due to partial hydrogenation, are known to be harmful to cardiovascular health. Complex fats is not a recognized category in nutritional science, making it an unlikely choice. Understanding the types of fats and their sources can help individuals make healthier dietary choices.