Here's why:
* Syllable Structure: A syllable is built around a vowel sound. The vowel sound is the core of the syllable, and the consonants surrounding it are considered "marginal" elements.
* Vowel Sound Definition: A vowel sound is produced by the free flow of air through the mouth, with no obstruction. This allows for the creation of different tones and pitches, which are essential for distinguishing different vowel sounds.
* Multiple Vowel Sounds: Having multiple vowel sounds in a single syllable would essentially create multiple syllables, as each vowel sound would require its own "space" within the word.
Example:
The word "cat" has one syllable:
* C (consonant)
* A (vowel sound)
* T (consonant)
The vowel sound "a" is the core of the syllable, and the consonants "c" and "t" are surrounding elements.