Question

what your nose knows
1 your sense of smell enriches your experience of the world around you. different scents can change your mood or transport you back to a distant memory. your ability to smell also plays a key role in your health. if your ability to smell declines, it can affect your physical well - being and everyday safety.
2 whether its freshly brewed coffee, pine trees in a forest, or smoke from a fire, the things we smell are actually the tiny molecules released by substances all around us. when we breathe in these molecules, they stimulate specialized sensory cells high inside the nose. each of these
where would the description of a promising new smell - loss treatment fit best?
the third paragraph
the seventh paragraph
the ninth paragraph
the tenth paragraph

Explanation:

The first paragraph introduces the importance of the sense of smell to experience and health. The second paragraph explains the science behind smell - molecules stimulating sensory cells. A new smell - loss treatment would be a new development related to the health aspect of smell. It would logically follow the initial health - related mention in the first paragraph, so it would fit best in the third paragraph.

Answer:

the third paragraph