If privacy, space, and surveillance had to be condensed into one main lesson, what would the lesson be?

privacy: a state in which one is not observed or disturbed by other people.

space: a continuous area or expanse which is free, available, or unoccupied.

surveillance: being watched or kept

Explanation:

The right answer for the main lesson would be security,

In security, you can watch others (surveillance) and at the same time you could be secure and be away form others (space and privacy)

answer; the basal forebrain;