Here's why:
* Schwa Sound: The schwa sound (ə) is a very short, unstressed vowel sound. It's often described as the sound in the "a" of "about" or the "e" of "the."
* Wonder: The vowel sound in "wonder" is the long "o" sound, as in "bone." This sound is not a schwa.
Let me know if you have any other questions!