Which statement is true about voice?
a. voice uses a wider range of pitch and volume as compared to speaking,
b.
the greater the tension on the vocal chords, the lower the pitch.
c. women can produce a lower range of pitches as compared to men.
d.
african singers sit on the floor while singing.

A. Voice uses a wider range of pitch and volume as compared to speaking,

Explanation: The human voice is the sound that results from a physiological action, identifying the person as to their age, gender, race, physical size, personality characteristics and emotional state.

The voice is produced in the larynx, where are the vocal folds, which in the act of speech approach gently and perform a vibration movement, thanks to the passage of air that comes from the lungs during the act of exhalation, and the sound is produced. In this regard, it is important to note that voice uses a wider range of pitch and volume as compared to speaking.

i'm not too sure - if you could attach the picture