What term refers to the spontaneous noises made by infants that consist of sounds from their native language only?

The correct term for the spontaneous noises made by infants that consist of sounds from their native language only is known as babbling. Babbling typically begins around six months of age and involves the repetition of consonant-vowel combinations that are characteristic of the sounds found in the infant's surrounding language. This stage represents an important aspect of language development where infants start to experiment with their vocal cords and begin to produce sounds that more closely resemble the phonetic patterns of their native language.

Unlike cooing, which generally includes a wider range of sounds and occurs earlier in development, babbling is more structured and language-specific. It lays the foundation for later stages of language acquisition, leading toward the production of actual words and more complex speech patterns. Phonological development encompasses a broader scope of how individuals learn the sound system of their language rather than the specific stage of babbling. Holophrastic speech refers to a single word that expresses a complete thought, which typically comes after the stage of babbling. Therefore, babbling is the most accurate choice in this context.