Final answer:
Children's ability to segment words before they can speak is explained by their sensitivity to phoneme patterns, not the presence of breaks between words (option C). This skill develops naturally as they are biologically predisposed to learn language, further refined by environmental interactions.
Step-by-step explanation:
Children, before they can even speak, are sensitive to statistical regularities in the language they hear and use this sensitivity to help segment words. This ability occurs because children learn which phonemes might go together when listening and use that to figure out where words might be. From birth, babies recognize their mother's voice and can discriminate between the language(s) spoken by their mothers and foreign languages. They also show a preference for faces that move in synchrony with audible language, indicating an early development of language and communication skills.
Over time, influenced by both biology and environmental interaction, children demonstrate an understanding of the rules of language, applying them in creating simple sentences and rapidly acquiring new vocabulary. Even the errors they make, such as overgeneralization, demonstrate their grasp of language rules. By engaging with their linguistic environment, children's lexicon grows, and they move through stages of language development with remarkable speed, without formal instruction, guided by their innate predispositions and cognitive abilities.
While babies do listen for breaks between words, this is not the main mechanism behind their word segmentation abilities; it is their attention to phoneme patterns that is crucial. Answer C best explains how children are able to segment words despite not knowing words yet: They learn which phonemes might go together when listening, which helps them determine word boundaries.