Three hours after going to sleep shoshanna's heart rate increases, her breathing becomes more rapid, and her eyes move rapidly under her closed lids. research suggests that shoshanna is

Dreaming

Explanation:

These are all symptoms that people commonly experience while they dream. When we sleep, our body becomes very still and our breathing slows down. However, our brain continues to process information that it acquired during the day. One way in which it does this is by dreaming. While we dream, our heart rate increases, our breathing becomes more rapid and our eyes move quickly. This usually occurs during the REM phase of deep sleep.

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