Answer:
A. True
Step-by-step explanation:
True. In many instances, two different consonant phonemes in English are formed the same way in the mouth, but one is voiced and the other is unvoiced. This is because the way a sound is voiced or unvoiced is determined by the vibrations of the vocal cords, rather than the way the sound is produced in the mouth. For example, the phonemes /p/ and /b/ are both made by pressing the lips together and releasing them quickly, but /p/ is unvoiced because the vocal cords do not vibrate when it is produced, while /b/ is voiced because the vocal cords do vibrate. Similarly, the phonemes /s/ and /z/ are both made by forcing air through a narrow channel at the front of the mouth, but /s/ is unvoiced while /z/ is voiced.