Final answer:
Exercise and a healthy diet are important for overall health and can decrease chances of developing disease, but they cannot guarantee complete immunity against all serious diseases.
Step-by-step explanation:
The true statement about exercise and health is Option 3: Exercise and a healthy diet play an important role in decreasing your chances of developing a disease. While a good diet and regular exercise significantly contribute to overall health, they cannot guarantee the absence of serious diseases. Similarly, even individuals with a genetic predisposition may maintain or improve their health with proper habits. Your health is a complex outcome of genetics, environment, lifestyle habits, among others.
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