An individual is a fifty-year-old smoker that lives in a highly polluted city, gets no exercise, eats fast food every day, and has a family history of lung cancer. Which of the following is an uncontrollable risk factor?

Heredity is an uncontrollable risk factor because a person cannot choose or change their family history. Diet, smoking, and exercise habits are behaviors that can be changed. Therefore, the correct choice is heredity.

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