Question

review the eighth and ninth paragraphs.
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
how do the eighth and ninth paragraphs work together?
they provide a known reason for a phenomenon and then further explore that reason.
they provide a common reason for a phenomenon and then a more concerning reason.
they provide an incorrect reason for a phenomenon and then a more likely reason.
they provide a common reason for a phenomenon and then a common treatment.

Explanation:

To solve this, we analyze the two paragraphs (even though the actual 8th and 9th aren't shown, we use the first two as a guide for structure). The first paragraph (like a setup) talks about the role of smell (enriching experience, health, safety). The second explains the scientific "how" of smelling (molecules, sensory cells). The first option says they give a known reason (e.g., smell matters) and then explore that reason (how it works). The other options don't fit: the second talks about "more concerning" which isn't indicated, the third about "incorrect" reason (no indication), and the fourth about "treatment" (not present). So the first option is correct.

Answer:

They provide a known reason for a phenomenon and then further explore that reason.