Dietary fats are also known as fatty acids. They can be found in foods from both plants and animals. There are four types of fats: saturated fat and trans fats, noted as bad fats and found in high-fat meats and dairy products and monounsaturated fat and polyunsaturated, which are the "good" fats (nuts, vegetable oil, avocado..)
From the given options the source for most of the dietary fats are: nuts, fish and vegetable oil, because these fats are healthy for the heart.