The olfactory organ is responsible for the sense of which of the following?

The olfactory organ is primarily responsible for the sense of smell. This organ contains specialized sensory cells that detect odor molecules in the environment. When these molecules bind to the olfactory receptors, they send signals to the brain, where the perception of different smells occurs.

The other choices relate to different sensory organs: taste is managed by the taste buds on the tongue, hearing is facilitated by the structures in the ear such as the cochlea, and touch is detected through various receptors in the skin and other tissues. Each of these senses has its own specific organ and receptor type, distinct from the olfactory system, reinforcing the unique role the olfactory organ plays in the sensory experience of smelling.