Final answer:
The word 'in' in the phrase 'in North and South America' is a preposition.
Step-by-step explanation:
The underlined word in in the phrase in North and South America is a preposition. Prepositions are words that show the relationship of a noun or pronoun to another word in a sentence. In this case, the preposition in is showing the relationship between the location (North and South America) and something else in the sentence.
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