Final answer:
A healthy diet has many long-term benefits, but it cannot completely eliminate the possibility of developing certain diseases.
Step-by-step explanation:
A healthy diet has many long-term benefits, including improved focus, a stronger cardiovascular system, and a better-equipped body to fight disease. However, one of the long-term benefits of a healthy diet is NOT that many diseases are less likely to occur. While a healthy diet can help reduce the risk of certain diseases, it cannot completely eliminate the possibility of developing them.