Which phrase represents the acknowledgment or respect shown toward a master?

The phrase that best signifies acknowledgment or respect shown toward a master in martial arts is "Sabum-Nim Kae Dehayo Kyung Rye." In this context, "Sabum-Nim" specifically refers to the title given to a master instructor, denoting their expertise and the respect they command. The phrase "Kae Dehayo Kyung Rye" translates to an act of bowing or showing respect, which is a fundamental aspect of martial arts etiquette. This conforms with both the cultural significance of acknowledging a teacher and the formal practices seen in training sessions and ceremonies.

Other phrases while similar do not hold the same direct reference to the master instructor. "Kyo Bum Nim" pertains to a different title that does not convey mastership in the same way, and "Kwan Chang Nim" refers to a leader of a school or organization, which is distinct from the personal respect shown to an instructor. "Gamsa Hapnida," meaning "thank you," signifies gratitude but does not directly convey the element of respect through the act of bowing to a master. Thus, the chosen phrase captures the spirit of acknowledgment and respect uniquely associated with a master instructor.