Which of the following is a symptom of sleep apnea?

Excessive daytime sleepiness is a key symptom of sleep apnea due to the repeated interruptions in breathing that occur during sleep. These interruptions can lead to fragmented sleep, preventing individuals from achieving the restorative deep sleep necessary for physical and mental functioning. This lack of quality sleep often manifests as excessive sleepiness during the day, making it difficult for affected individuals to stay alert and focused on daily activities.

In contrast, hyperactivity may not be directly linked to sleep apnea and can be associated with other conditions or factors. Weight loss is not a symptom of sleep apnea; in fact, many individuals with sleep apnea are often overweight, and losing weight can sometimes help alleviate symptoms. Chronic pain is also not a typical symptom of sleep apnea, although it may coexist with other conditions affecting sleep but wouldn’t be considered a direct symptom of the disorder itself.