Answer:
Cooing
Explanation:
Cooing is when an Infants around 6-8 weeks old begin producing long, drawn-out vowel sounds (e.g., "aaaaaaaaah"). These sounds get responses from other people, and infants soon have take turns making sounds back and forth with their caregivers, it is a stage of infants' prelinguistic speech development and consists of the production of single syllable, vowel-like sounds like "a", "i"
