Question

what organ does nicotine target that results in changes to mood and anxiety?
○ brain
○ heart
○ lung
○ pancreas

Explanation:

Nicotine affects mood and anxiety by targeting the brain. It interacts with neurotransmitters in the brain (like dopamine, serotonin) which regulate mood. The heart is related to cardiovascular effects, lungs to respiratory, and pancreas to blood sugar (not mood/anxiety regulation). So the correct option is brain.

Answer:

A. brain