What musical concept is best introduced by tapping a music triangle with a metal striker in a pattern?

Tapping a music triangle with a metal striker in a pattern primarily showcases the concept of rhythm. Rhythm refers to the pattern of sounds and silences in music, organized in time. When you tap the triangle, you create a sequence of notes that can vary in length and intensity, allowing students to experience the beat and timing of music. This physical act of striking the triangle reinforces the understanding of rhythmic patterns, enabling learners to grasp how different durations and accents create a musical structure.

Melody, on the other hand, involves a sequence of musical notes that are perceived as a single entity, often sung or played in succession. Harmony refers to the combination of different musical notes played or sung simultaneously, which is not demonstrated by a single-note instrument like a triangle. Dynamics pertains to the volume of sound and the variations in loudness, which can be explored but are not primarily introduced through the act of tapping a triangle. Thus, the act of creating patterns through tapping specifically aligns with the foundation of rhythm in music education.