Which statement indicates effective teaching on the protective mechanisms of the eye?

The statement about air pollution causing increased blinking effectively highlights one of the protective mechanisms of the eye. Blinking serves several important functions, including clearing irritants from the surface of the eye, such as dust and pollution, and keeping the eyes moist. Increased blinking in response to environmental factors like air pollution is a natural reflex to protect the eyes from potential harm or discomfort. This connection directly relates to understanding how the body responds to maintain the health and safety of the eye, making it a strong representation of effective teaching about eye protection mechanisms.

In contrast, other statements do not convey the same level of understanding regarding the eye's protective strategies. For instance, the notion that eyelashes attract dust oversimplifies their primary role, which is to catch and block debris before it reaches the eye. Saying dry eyes are normal due to allergies misrepresents the concept of dryness as a condition that should be managed rather than normalized. Lastly, the idea that eyelids should swell to prevent bacteria invasion misinterprets the actual role of the eyelids, which typically function through movement to close over the eye, rather than swelling as a protective response. Each of these alternatives fails to accurately reflect the protective roles of various eye mechanisms.