Which of the following tasks demonstrates syllable awareness?

Understanding syllable awareness involves recognizing the distinct units of sound within words, which are critical for developing reading and writing skills. Counting or tapping syllables in a word is a practical task that directly measures a student's ability to discern these units. When a student taps out the syllables, they are breaking the word into its rhythmic parts, clearly demonstrating their understanding of how many times the tongue moves in the mouth to produce vocalizations.

The other tasks do not specifically address syllable awareness. Counting the number of vowels does not indicate an understanding of syllable structure since multiple vowels can exist within a single syllable. Segmenting a word into individual sounds focuses on phonemic awareness, which is related but distinct from syllable awareness. Identifying grammatical errors pertains to syntactical knowledge rather than phonological skills, which further separates it from the concept of syllables. Therefore, the task of counting or tapping syllables is the only one that accurately assesses a student's awareness of syllabic structure.