Which of the following sources is rich in unsaturated fats?

Olive oil is recognized for its high content of unsaturated fats, particularly monounsaturated fats, which are beneficial for heart health. These fats can help reduce bad cholesterol levels, potentially lowering the risk of heart disease and improving overall cardiovascular health. Oleic acid, the primary fatty acid in olive oil, has been associated with numerous health benefits, including anti-inflammatory properties.

In contrast, butter, beef, and coconut oil contain higher amounts of saturated fats. Saturated fats can raise levels of LDL cholesterol, which is often referred to as "bad" cholesterol, and are commonly found in animal products and certain tropical oils. While some saturated fats can still be included in a healthy diet, they should be consumed in moderation compared to unsaturated fats, which are generally seen as healthier for daily consumption.