Final answer:
Signed languages exist in the U.S to address the diverse linguistic needs of the population, provide a primary means of communication for the Deaf community, and foster cognitive reinforcement and recall in learning. They also accommodate the country's cultural diversity and uphold equitable language practices.
Step-by-step explanation:
Signed contact languages such as American Sign Language (ASL) exist in the U.S due to the diverse cultural backgrounds and needs of the population. In a country where there's no official language legally, the development of multiple languages including signed languages, caters to this diversity. Signed languages provide a vital mode of communication for the Deaf and Hard of Hearing community. They are fully formed, natural languages with their own syntax and grammar. Furthermore, allowing students to learn in and use their authentic voices, including nonstandard dialects and other forms of communication such as signed languages is considered a more equitable practice that is both culturally responsible and beneficial to learning. For instance, some parents teach their children both sign language and spoken language to provide deeper cognitive reinforcement and greater chance of recall. In conclusion, signed languages exist in the U.S to accommodate the linguistic diversity of the nation and ensure inclusivity and equity in communication.
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