Which term can be used to refer to close physical or relational distance?

The term that refers to close physical or relational distance is "proximity." This word is specifically used to describe how near or far objects, people, or situations are from one another. It captures both literal spatial closeness as well as the figurative closeness in relationships. Proximity implies a certain nearness, making it particularly relevant in discussions about relationships, social interactions, and geographical locations.

In contrast, the other options do not convey the same sense of closeness. "Pristine" refers to something that is unspoiled or in its original condition, thus relating to purity rather than distance. "Quack" typically refers to someone who dishonestly pretends to have medical skills, and does not pertain to proximity at all. "Pry" means to inquire too closely into someone’s personal affairs, which can imply intrusive behavior but does not communicate physical or relational distance.