Final answer:
A healthy lifestyle can help reduce the risk of developing many noninfectious diseases, but it does not prevent all diseases.
Step-by-step explanation:
A healthy lifestyle can help reduce the risk of developing many noninfectious diseases. However, it is important to note that making good lifestyle choices does not guarantee the prevention of all diseases. While lifestyle factors such as diet, exercise, and avoiding harmful habits like smoking can reduce the risk of certain diseases like cardiovascular diseases, type 2 diabetes, and some types of cancer, there are other factors that contribute to the development of diseases, such as genetics and environmental factors.