What defines a syllable?

A syllable is primarily defined as a unit of pronunciation that contains one vowel sound. This characteristic is crucial because syllables serve as the building blocks of words and influence how words are spoken and understood in written language. Each syllable typically includes a vowel sound, which can be accompanied by consonants, forming a coherent unit.

This definition highlights why the correct choice focuses on the phonetic aspect of syllables rather than their semantic or grammatical roles. The other options, while relevant to language in general, do not accurately capture the essence of what constitutes a syllable. A syllable is not a unit of meaning or a grouping of multiple words, nor is it a type of figurative language; it is fundamentally about the sounds we produce when we speak. Understanding this concept is vital for effective reading instruction, as it underpins phonological awareness and helps learners decode and pronounce words correctly.