Question

which is a primary risk factor for developing cancer?
active immune system
lack of iron in the diet
lack of calcium in the diet
workplace exposure

Explanation:

• An active immune system helps fight off diseases, including cancer cells, so it is not a risk factor.
• Lack of iron in the diet leads to anemia, not directly to cancer.
• Lack of calcium in the diet affects bone health, not directly a primary cancer risk factor.
• Workplace exposure (e.g., to carcinogens like asbestos, certain chemicals) is a known primary risk factor for developing cancer.

Answer:

workplace exposure