A strong relationship seems to exist between the development of gestures and verbal abilities because

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Research shows that gestures and words develop simultaneously, and there is a strong relationship between the two. Infants start using gestures around 8-10 months of age, whereas their first words appear around 12 months. However, during the overlapping period, infants use both gestures and words to communicate, and the development of gestures is closely related to the development of vocabulary and grammar. Therefore, option D is the best choice.

A Strong Relationship Seems to Exist Between the Development of Gestures