Final answer:
The organization of beats into regular groups is known as meter, which involves a repetitive pattern of strong and weak beats that create the rhythm and musicality of a piece.
Step-by-step explanation:
The organization of beats into regular groups in a piece of music is known as meter. Meter involves the arrangement of rhythms in a repetitive pattern of strong and weak beats. For example, we often encounter meters in nursery rhymes; consider the rhythm in "There was an old woman who lived in a shoe." Each line of the rhyme will have a certain number of syllables and a pattern of stressed (/) and unstressed (x) beats, forming what is known as a foot. Different types of meter, such as iambic or trochaic, can be used to create different rhythmic effects within poetry. The systematic arrangement of these rhythmic patterns adds to the poem's musicality and helps shape the work's overall rhythm and flow.