What is the N3 stage of sleep primarily associated with?

The N3 stage of sleep, also known as slow-wave sleep (SWS), is primarily associated with deeper sleep and recovery. This stage is characterized by the presence of delta waves in the EEG, indicating that the individual is in a state of profound relaxation and reduced physiological activity. During N3 sleep, the body goes through critical recovery processes including tissue growth and repair, immune function enhancement, and energy restoration. It plays a vital role in physical health and well-being, making it essential for overall recovery after daily activities.

This stage is crucial for consolidating memories and learning as well, as it supports cognitive functions. Therefore, the focus during N3 is on achieving deeper levels of rest and physiological recovery, making option B the correct choice.