What protects humans from air pollution? 

A)  special cells with arm-like extensions that capture small particles 
B)  walking away from the direction of the wind 
C)  a screen-like mesh of fibres within the lung tissue 
D)  tiny, mucus-coated, hairlike structures called cilia

Air Pollution

The presence of substances in the atmosphere that are harmful to human health, the environment, or the climate.

Cilia

Microscopic, hair-like structures that extend from the surface of some cells, involved in movement and sensory functions.

Special Cells

Unique or specialized cells that perform specific functions within an organism, such as nerve cells, muscle cells, or stem cells.