What is one controllable risk factor for a communicable disease

physical inactivity

Explanation:

Controllable risk factors are those that you can "avoid" that cause a disease to arise. That is, risk factors can be avoided if you try hard and put yourself away from them. As an example of these factors we can mention the physical inactivity, the use of tobacco, unhealthy food, among others.

Physical inactivity, specifically, can trigger several cardiovascular diseases. This is a controllable risk factor because it can be avoided with regular physical activity.

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