Which brain waves are exhibited during higher-level consciousness?

Higher-level consciousness is primarily associated with beta waves. These brain waves are characterized by their fast frequency and are typically present when an individual is alert, attentive, actively engaged in problem-solving, or involved in complex mental tasks. They signify an active state of mind, reflecting cognitive engagement and readiness to respond to external stimuli.

In contrast, delta waves are associated with deep sleep, while alpha waves indicate a relaxed, calm state often seen when an individual is awake but not actively thinking. Theta waves are linked to light sleep and deeper relaxation, such as during meditation. Therefore, beta waves stand out as the primary indicator of higher-level consciousness, making them the correct choice in this context.