Final answer:
Vegetable and fish oils are rich in polyunsaturated fat, which is a healthy type of fat that can lower bad cholesterol levels and reduce the risk of heart disease.
Step-by-step explanation:
Vegetable and fish oils are rich in polyunsaturated fat. Polyunsaturated fats are a type of unsaturated fat that have multiple double bonds in their chemical structure. They are considered healthy fats because they can lower bad cholesterol levels and reduce the risk of heart disease. Examples of vegetable oils rich in polyunsaturated fats include soybean oil, corn oil, and sunflower oil, while oily fish like salmon and trout are good sources of polyunsaturated fats as well.