Respuesta :

laineyholder5

Answer:

infants begin showing a spontaneous "social smile " around 2 to 3 months and begin to laugh spontaneously around 4 months

Explanation:

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samagu9488

Answer:

nfants begin showing a spontaneous "social smile " around 2 to 3 months and begin to laugh spontaneously around 4 months

Explanation:

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