Question

the two external openings into the nasal cavity are called the: a nares. b cilia. c sinuses. d nasal septum.

Explanation:

The external openings to the nasal cavity are the nares. Cilia are tiny hair - like structures in the nasal cavity for filtering. Sinuses are air - filled cavities connected to the nasal cavity. The nasal septum divides the nasal cavity into two halves.

Answer:

A. nares