A sleep disorder characterized by difficulty in falling asleep or remaining asleep is called: (A) Narcoplepsy (B) Sleep apnea (C) Insomnia (D) Sleep terror (E) Nightmares

The correct answer is (C) Insomnia. Insomnia is a sleep disorder characterized by difficulty falling asleep or staying asleep. It can be caused by various factors, including stress, anxiety, depression, certain medications, and medical conditions. Insomnia can lead to daytime fatigue, impaired cognitive function, and other negative consequences. Treatment options for insomnia may include lifestyle changes, relaxation techniques, cognitive-behavioral therapy, and in some cases, medication.