Danny is Navajo. He learned the Navajo language from his grandmother when he was very young. When he started school, he had to learn English and his ability to speak Navajo had declined by third grade. This is an example of

Question

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Subtractive bilingualism occurs when a second language is learned at the expense of the first language, leading to a decline in proficiency in the first language, as seen in Danny's case.

Danny Is Navajo