What does "m.s." stand for in musical notation?

The abbreviation "m.s." in musical notation specifically indicates that the passage should be played with the left hand. This notation is crucial in piano music, where clear indications must be provided for hand distribution to achieve proper technique and sound. Understanding hand notation helps performers accurately interpret the music as intended by the composer and execute passages effectively.

The other options refer to different hand indicators or dynamics, but they do not align with the specific meaning of "m.s." It is essential for musicians to recognize distinct terms related to hand usage in order to enhance their performance skills and adhere to the written score.