Infants around 6-8 weeks old begin producing long, drawn-out vowel sounds (e. g., "h"). These sounds get responses from other people, and infants soon have take turns making sounds back and forth with their caregivers. What is this called

Cooing

Explanation:

Cooing is when an Infants around 6-8 weeks old begin producing long, drawn-out vowel sounds (e.g., "h"). 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"

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.

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