Which type of syllable is characterized by having a long sound?

The type of syllable characterized by having a long sound is the open syllable. An open syllable occurs when a syllable ends in a vowel sound, allowing the vowel to be pronounced with its long sound, as in the words "go" or "he." In this structure, there is no consonant following the vowel to influence its sound, resulting in the typical long pronunciation of that vowel.

Open syllables are a fundamental concept in phonics and reading instruction, as they help learners understand how vowels function within different syllable structures. Recognizing open syllables is important for developing literacy skills. This is why the correct choice is open syllable, as it directly reflects the phonetic principle of vowel sounds within syllable types.