The noises or sounds being made and how strong they are
Structure should be it, or that's what my teacher called it.
Doing quite well actually how about you?
I believe the correct answer is: a. Control of Phonation.
"Raspberries" are examples of sounds made in the control
of phonation stage of child’s language development. The control of phonation
stage (from 1 to 4 months old) is when the lips and tongue become more
coordinated with phonation, and child begins to say consonant-like sounds,
although these are not yet fully formed.
