Final answer:
Nathan is likely to experience sleep disturbances due to the constant daylight, impacting his sleep quality during his stay in Alaska.
Step-by-step explanation:
Nathan, a young man living in North America, experiences difficulty sleeping unless there is natural darkness. During his stay in Alaska, where the sun never sets in June, Nathan is likely to experience sleep disturbances due to the constant daylight, impacting his sleep quality.
Our biological clock is driven by light, and exposure to continuous daylight can disrupt our circadian rhythms and make it difficult to fall asleep and stay asleep.