What phrase describes the learning of language through exposure to adults who utilize the language competently?

The phrase that best describes the learning of language through exposure to adults who utilize the language competently is "incidental language learning." This concept refers to the process by which individuals, particularly children, acquire language skills naturally through interactions and communications in their environments. When children are surrounded by adults who model language use effectively, they learn vocabulary, grammar, and contextual usage without formal instruction. This immersion allows for a richer understanding of language as they pick up nuances, tone, and social cues.

In contrast, assistive hearing devices aid individuals with hearing impairments but do not directly pertain to language learning mechanisms. Total Communication is an educational philosophy that combines various communication methods, including spoken language, sign language, and other forms of communication, which may not focus specifically on the incidental learning aspect. Language pragmatics refers to the social language use, including how context influences meaning, which, while related to language use, is not a specific descriptor for incidental learning through competent adult interaction.