Final answer:
The correct sequence of language development is phonemes, morphemes, telegraphic speech, and pragmatics, which reflects the development from basic sounds to functional language use in social contexts.
Step-by-step explanation:
The correct sequence of language development in children, from elementary units to functional language use, is phonemes, morphemes, telegraphic speech, and pragmatics. As such, the correct option is a. phonemes, morphemes, telegraphic speech, pragmatics. This sequence reflects the developmental aspects of language acquisition.
Phonemes are the smallest units of sound in a language that distinguish one word from another. Morphemes are the smallest units of meaning, including prefixes, root words, and suffixes. Telegraphic speech appears when children begin to combine words into simple but meaningful sentences, typically using noun-verb combinations. The stage of pragmatics involves understanding the social context of language, allowing children to use appropriate language in different situations and understand figurative language and humor.