what are the stages of speech development?
['3 - 6 months. Listening & Attention. Watches face when someone talks. ... ', '6 - 12 months. Listening & Attention. Locates sources of voice with accuracy. ... ', '12 - 15 months. Listening & Attention. ... ', '15 - 18 months. Listening & Attention. ... ', '18 - 2 years. Listening & Attention. ... ', '2 - 3 years. Listening & Attention. ... ', '4 - 5 years. Listening & Attention.']