Which of the following food groups is rich in omega-3 fatty acids?

The food group that is rich in omega-3 fatty acids is fatty fish. Omega-3 fatty acids are a type of polyunsaturated fat that are essential for human health. They play a crucial role in brain function, as well as normal growth and development. Fatty fish such as salmon, mackerel, sardines, and trout are particularly high in these beneficial fats.

In contrast, while cereals and vegetables may have some health benefits, they generally do not contain significant amounts of omega-3 fatty acids. Dairy products are also not known for being a primary source of these essential fats. Therefore, fatty fish stands out as the best choice for obtaining omega-3 fatty acids in the diet.