Final answer:
The appropriate noun to fill in the blank is 'América del Sur'. Argentina is located in South America.
Step-by-step explanation:
The appropriate noun to fill in the blank in the sentence 'Mis tíos son argentinos. Ellos son de ________.' is América del Sur.
This sentence translates to 'My uncles are Argentine. They are from ________.'
The correct answer is América del Sur because Argentina is located in South America. América del Norte refers to North America, América Central refers to Central America, and Europa refers to Europe.
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