Question

the small hairs that line the opening to the nose and the airways are called: a sinuses. b nares. c septa. d cilia.

Explanation:

Cilia are the small hair - like structures that line the opening to the nose and airways. They help to move mucus and trapped particles out of the respiratory tract. Sinuses are air - filled cavities in the skull, nares are the nostrils, and septa divide the nostrils and other body cavities.

Answer:

D. cilia