Question

the condition of not being alert or aware of your surroundings.

unaware

concussion

dizziness

unconsciousness

Explanation:

The question defines a condition of not being alert or aware of surroundings. "Unaware" is an adjective, not a condition. "Concussion" is a brain injury that may cause such symptoms but is not the condition itself. "Dizziness" involves lightheadedness, not lack of awareness. "Unconsciousness" refers to the state of being not alert or aware of surroundings, matching the definition.

Answer:

D. Unconsciousness