Which of the following is evidence of the biological foundation of language?

• A. The existence of Broca's and Wernicke's areas in the human brain
• B. The use of sign language in deaf communities
• C. Children learning multiple languages in multicultural environments
• D. Variations in vocabulary size among individuals

Answer: (A)

Verified step by step guidance

1. Understand that the biological foundation of language refers to the physical and neurological structures in the brain that enable language processing and production.
2. Identify key brain areas known to be involved in language, such as Broca's area, which is associated with speech production, and Wernicke's area, which is linked to language comprehension.
3. Recognize that evidence of a biological foundation would involve physical brain structures or neurological functions specifically tied to language abilities.
4. Evaluate each option to see if it directly relates to brain structures or neurological evidence rather than social or environmental factors.
5. Conclude that the existence of Broca's and Wernicke's areas in the human brain is direct evidence of the biological basis of language, as these areas are specialized for language processing.