The correct answer is A. Far.
The word “distant” means “far away in space or time.” It can also mean “not close in relationship or feeling.”
The word “removed” means “taken away or separated from a place or position.” It can also mean “kept apart or isolated.”
The word “reserved” means “kept for a particular purpose or person.” It can also mean “not showing or expressing one’s feelings.”
The word “separate” means “to keep or put apart.” It can also mean “to become or cause to become different or distinct.”
In the context of the question, the word “distant” is the most appropriate answer because it refers to the physical distance between two objects. The other options, “removed,” “reserved,” and “separate,” do not refer to physical distance.