Final answer:
Consciousness is matched with alertness, precociousness with early development, and both unconsciousness and sleepwalking represent a lack of awareness.
Step-by-step explanation:
The question asks to match each example with the correct level of consciousness:
A) Alertness is matched with consciousness, as this represents a state of full awareness and sensory perception.
B) Early development is matched with precociousness, which describes advanced mental development or abilities at an unusually early age.
C) Lack of awareness is matched with unconsciousness, indicative of a state where there is a lack of sensory awareness or response to external stimuli.
D) Sleepwalking is typically associated with a state of unconsciousness, as the individual is not fully aware of their actions and environment.