Final answer:
Monounsaturated fats raise the level of HDL cholesterol in the blood, promoting heart health, whereas saturated and trans fats can negatively impact cholesterol levels.
Step-by-step explanation:
The type of fats that raises the level of HDL cholesterol in the blood is C. Monounsaturated fats. These fats are typically liquid at room temperature due to their chemical structure and are found in various foods such as olive oil, nuts, and avocados. Consuming these types of fats is associated with a lower risk of heart disease and can help maintain healthy levels of HDL cholesterol.
In contrast, saturated fats and trans fats can have a detrimental effect on cholesterol levels. Saturated fats, found mainly in animal products, can increase LDL (low-density lipoprotein) or 'bad' cholesterol levels. Trans fats, often found in processed foods, not only increase LDL cholesterol but also decrease HDL, or 'good' cholesterol levels, thereby posing a risk for cardiovascular disease.
Polyunsaturated fats, including omega-3 fatty acids found in fish like salmon, are also beneficial as they both lower LDL cholesterol and elevate HDL cholesterol, contributing to a balanced lipid profile and reduced heart disease risk.