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Olive oil and canola oil are primarily composed of monounsaturated fats, which are considered heart-healthy fats. These fats can help reduce bad cholesterol levels, thereby decreasing the risk of heart disease. Monounsaturated fats are typically found in higher quantities in foods like avocados, nuts, and seeds.

In contrast, saturated fats are generally solid at room temperature and are found in animal fat and some plant oils, which do not have the same health benefits as monounsaturated fats. Polyunsaturated fats also have health benefits, but they are a different category that includes omega-3 and omega-6 fatty acids found in fish and certain seeds and oils. Trans fats, on the other hand, are artificial fats that are often linked to negative health outcomes, making them the least desirable fat option. Thus, olive oil and canola oil being classified as sources of monounsaturated fats highlights their role in a healthy diet and their benefits for cardiovascular health.