Larger inhalable particles like dust, pollen, and smoke.

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Multiple Choice

Larger inhalable particles like dust, pollen, and smoke.

Explanation:
Particles are classified by size because it changes how they interact with the respiratory system. Larger inhalable particles up to about 10 micrometers in diameter—dust, pollen, and smoke—tend to lodge in the nose and throat rather than reach deep into the lungs. This category is known as PM10. In contrast, finer particles (PM2.5) can penetrate deeper into the lungs and even enter the bloodstream, while ozone and VOCs are gases, not particulates, so they don’t fit the description of inhalable particles.

Particles are classified by size because it changes how they interact with the respiratory system. Larger inhalable particles up to about 10 micrometers in diameter—dust, pollen, and smoke—tend to lodge in the nose and throat rather than reach deep into the lungs. This category is known as PM10. In contrast, finer particles (PM2.5) can penetrate deeper into the lungs and even enter the bloodstream, while ozone and VOCs are gases, not particulates, so they don’t fit the description of inhalable particles.

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