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1. AFirst words, single meaningful words used consistently that typically emerge around 12 months
2. BCooing, the production of vowel-like sounds that typically emerges around 2 to 3 months of age
3. CBabbling, repetitive consonant-vowel syllables such as 'ba-ba' that typically emerge around 6 months
4. DTelegraphic speech, short utterances that leave out smaller connecting words
5. EJargon speech, strings of babble produced with adult-like intonation but no clear words