Answer:
b. stroke.
Explanation:
- Lung cancer: cancer is when the cells start to grow out of control crowding out normal cells and causing problems in the lungs
- Stroke: it occurs when the blood supply to the brain is reduced or interrupted killing cells due to the lack of oxygen and nutrients.
- Asthma: is a condition where the airways in the lungs inflame intermittently narrowing them.
- Emphysema is the gradual damage of lung tissue (specifically alveoli)
Considering this information we can conclude that only the stroke occurs out of the respiratory system because it affects the brain.
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