Multiple choice

Which of the following options is not an external factor affecting health?

  1. Environmental pollution

  2. Immune disfunctioning

  3. Drinking alcohol

  4. Microorganisms
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Immune dysfunction is an internal factor because it involves the body's own defense system malfunctioning from within. The other options - environmental pollution, drinking alcohol, and microorganisms - are external factors that come from outside the body. While viruses can cause immune issues, immune dysfunction itself is an internal problem.

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