Tracey is deep in meditation. If an EEG recording were taken, Tracey's brain wave pattern would look very similar to the pattern seen when a person is:

a. in Stage 2 sleep
b. drowsy, but not yet asleep
c. in slow-wave (Stage 3 or 4) sleep
d. in REM sleep

I think it is B but im not sure

Disagree. From Google:

Theta waves (3 to 8 Hz) Theta brainwaves occur most often in sleep but are also dominant in deep meditation.

To determine which stage of brain wave pattern Tracey's meditation closely resembles, let's analyze the options one by one:

a. Stage 2 sleep: During this stage, brain waves show sleep spindles and K-complexes. Sleep spindles are brief bursts of brain activity, while K-complexes are high-amplitude wave patterns. This stage is characterized by distinct brain activity that is unlikely to be similar to Tracey's deep meditation.

b. Drowsy, but not yet asleep: As the name suggests, this stage occurs when someone is transitioning from the awake state to sleep. Brain wave patterns include alpha waves, which are relatively slow and regular waves that occur when we are relaxed but still awake. This stage has some similarities to the meditative state; however, let's continue exploring the other options before jumping to conclusions.

c. Slow-wave (Stage 3 or 4) sleep: These stages are known as slow-wave sleep (SWS) or deep sleep. During SWS, the brain produces slow, high-amplitude delta waves. This stage is associated with restorative functions and physical recovery. While deep meditation can be mentally restorative, the brain wave patterns are not likely to be as slow and regular as those observed during deep sleep.

d. REM sleep: Rapid Eye Movement (REM) sleep is characterized by desynchronized brain activity similar to wakefulness, rapid eye movements, and vivid dreams. This stage is less likely to match the brain wave patterns of a person in deep meditation.

Considering the options and their descriptions, option B, "drowsy, but not yet asleep," seems to be the most appropriate choice. The relaxed brain wave patterns during this stage resemble the calm and focused state that one typically experiences during deep meditation. However, please note that brain wave patterns during meditation can vary among individuals, and this is just a general comparison.

To be more conclusive, EEG recordings of individuals in a deep meditative state would need to be analyzed and compared to sleep stages.