Final answer:
Fish, such as salmon, trout, and tuna, are the best food sources of omega-3 fatty acids.
Step-by-step explanation:
The food most likely to be a good source of omega-3 fatty acids is fish. Fish such as salmon, trout, and tuna are rich in omega-3 fatty acids. These fatty acids are important for brain function, normal growth and development, and may help reduce the risk of heart disease and some cancers.