Question

Why do we often sneeze when a lot of dust laden air​

Answer 1

Answer: We often sneeze when there is a lot of dust in the air because the dust settles in our throats or lungs.

Explanation: To clear of this dust we sneeze.

Answer 2

$\huge\underline\mathfrak{\pink{AnSwEr }}$

• We often sneeze when we inhale a lot of dust-laden air to expel out these foreign particles. These particles get past the hair in the nasal cavity and irritate the lining of the cavity which  triggers a message to the brain. The brain instructs the nasal chamber to initiate sneezing. This is a method to remove the unwanted dust particles from the nostrils. Sneezing is a type of defense mechanism used by our body.