Final answer:
Essential fatty acids, particularly omega-3 and omega-6 fatty acids, must be obtained from the diet for maintaining health. Trans fats are harmful to health and should be avoided. Monounsaturated and polyunsaturated fats are considered healthier than saturated fats and are commonly found in vegetable oils.
Step-by-step explanation:
Essential fatty acids, specifically omega-3 and omega-6 fatty acids, must be present in the diet to maintain health. These fatty acids cannot be synthesized by the body and need to be obtained from food sources. Good food sources of omega-3 fatty acids include oily fish such as salmon, walnuts, and flax seeds.
Trans fats, on the other hand, are known to be detrimental to human health and should be avoided. They are typically created in an industrial process called partial hydrogenation and are often found in processed foods.
Saturated fats are also considered unhealthy fats and are more common in animal fats, while unsaturated fats, including monounsaturated and polyunsaturated fats, are considered healthier and are more common in vegetable oils.