original_query: What is the relationship between the predominance of CV syllables in languages and the limited range of movements of the human vocal organs?
query: What is the relationship between the predominance of CV syllables in the world's languages and the limited range of movements in infants' vocal organs?
answer: The limited movement possible by the infant jaw and mouth might be responsible for the typical consonant-vowel (CV) alternation in babbling.  It has even been suggested that the predominance of CV syllables in the world's languages might evolutionarily have been caused by this limited range of movements of the human vocal organs.