Stage 2: Cooing and laughter or controlled phonation (1-4 months) corresponds to which option?

• A. Reflexive crying
• B. Vocal play
• C. Cooing and laughter
• D. Basic canonical babbling

Answer: (C)

Stage 2 is about controlled phonation, where the infant starts producing vowel-like sounds and even laughter. This shows the vocal mechanism gaining coordination beyond pure cries, with the lips and tongue shaping simple sounds rather than distress noises. That’s exactly what cooing and laughter describe—the early, vowel-centered vocalizations that emerge around 1–4 months as sound production becomes more purposeful.

It isn’t reflexive crying, which is the initial, involuntary vocal response to needs or discomfort. It isn’t vocal play, which involves a broader, more varied exploration of sounds and typically appears a bit later. And it isn’t basic canonical babbling, which comes with true syllable-like sounds (like repeated "ba" or "da") several months after this stage.