What is suggested by the fact that coos of all infants sound the same, regardless of whether the infant can hear?

Question

Quizplus · Accepted Answer

The fact that coos of all infants sound the same, regardless of whether the infant can hear, suggests that these sounds develop with the maturation of the brain and vocal organs, rather than being learned through listening to speech. This indicates a biological basis for these early vocalizations.

What Is Suggested by the Fact That Coos of All