Final answer:
Both (a) and (b) are accurate explanations of how serotonin and SSRIs relate to Kesha's mood.
Step-by-step explanation:
(c) Both (a) and (b) are accurate explanations of how serotonin and SSRIs relate to Kesha's mood.
Serotonin regulates sleep and appetite, and an imbalance may contribute to Kesha's symptoms, justifying the use of SSRIs to modulate serotonin levels. The prescription of SSRIs aims to enhance serotonin levels in Kesha's brain, potentially alleviating her symptoms of sadness and low energy.