What are seafood legumes and nuts primary sources of?

Seafood, legumes, and nuts are primary sources of essential nutrients. Seafood is rich in high-quality protein, omega-3 fatty acids, and various vitamins and minerals, particularly iodine and selenium. Legumes provide plant-based protein, dietary fiber, and important micronutrients like iron and folate. Nuts are a good source of healthy fats, particularly monounsaturated and polyunsaturated fats, as well as protein, fiber, vitamins, and minerals.