These cells provide for the sense of smell.
a) olfactory hair cells
b) gustatory cells
c)basal stem cells

The answer to the question: These cells provide for the sense of smell:___, would be, A: Olfactory hair cells.

Explanation:

The sense of smell might be one of the most primitive, but also one of the most amazing senses of the human system. This sense initiates with the introduction of smells, in the form of chemical molecules dissolved in air, that once they come into contact with the mucus in the nostrils dissolve and reach a group of cells, on the olfactory epithelium known as the olfactory receptor neurons. These cells capture the chemicals and send neural signals towards the olfactory bulbs, where sensory neurons relay the messages towards the brain centers. In the brain, several steps take place in order to gain sense, comprehension and assimilation of the smell that has been captured.

the ileocecal valve (also called bauhin valve), which limits the rate of food passage into the cecum and may prevent material from returning to the small intestine.