Which term denotes complex vowel sounds that blend two vowel sounds within the same syllable?

• A. Diphthongs
• B. Vowel team
• C. Graphemes
• D. Phonemes

Answer: (A)

Diphthongs describe complex vowel sounds that glide from one vowel to another within a single syllable. You hear this glide in words like coin, loud, boat, and rain, where the sound changes as you pronounce the vowel but stays within one syllable. This blending is what sets diphthongs apart from other vowel concepts, since the pronunciation actually shifts rather than staying fixed. A vowel team, by contrast, is two vowels that work together to produce one sound, often a long vowel, but not necessarily with a changing glide. Graphemes are the letters or letter combinations that represent sounds, and phonemes are the actual sounds themselves; neither specifically captures the idea of two vowel sounds blending inside one syllable.