Question

the process by which the brain creates a model of internal and external experience is defined as...

rem

consciousness

cognition

unconscious

Explanation:

• REM (Rapid - Eye Movement) is mainly related to a stage of sleep.
• Consciousness is the state of being aware of internal and external experiences, which fits the description of the brain creating a model of such experiences.
• Cognition is about mental processes like thinking, learning, etc., but not specifically the overall state of being aware (the model - creating aspect in the question's sense).
• Unconscious is the opposite of being aware of experiences.

Answer:

Consciousness