Step 1: Understanding personal space.
Personal space refers to the invisible boundary individuals maintain around themselves in social interactions.
Step 2: Evaluation of correct statements.
Personal space is silent and invisible, making option (A) correct.
It functions as a spatial or geographic component in interpersonal relations, validating option (B).
Violations of personal space can vary in intensity and context, so option (C) is also correct.
Step 3: Elimination of option (D).
Personal space varies significantly across cultures, making option (D) incorrect.
Step 4: Conclusion.
Thus, options (A), (B), and (C) are correct.