Question

the extent to which we are aware of what is going on both inside of us as well as in our external environment refers to our level of
consciousness
cognition
comorbidity
cognizance

Explanation:

Consciousness is the state of being aware of internal and external stimuli. Cognition is about mental processes like thinking and learning. Comorbidity refers to the presence of more than one condition. Cognizance is a more formal - sounding awareness but consciousness is the most appropriate term here as it encompasses awareness of self and environment.

Answer:

consciousness