The closest zone a stranger or business acquaintance is normally allowed to enter is an individual's space.

Personal space

Explanation:

The closest zone a stranger or business acquaintance is normally allowed to enter is an individual's personal space.

Personal space is also referred to as privacy and most people feel very uncomfortable when people who aren’t close to them try to enter into this space.

This is the main reason why personal space is the closest zone a stranger or business acquaintance is normally allowed to enter and he/she isn’t normally allowed to go farther than that.

answer; procedural justice;