Passage: 'The migration of monarch butterflies across North America represents one of the most remarkable navigational feats in the animal kingdom. Every autumn, millions of monarchs travel up to three thousand miles to specific oyamel fir forests in central Mexico. What makes this journey astonishing is that no individual butterfly makes the round trip; rather, it is the great-grandchildren of the autumn migrants that return north the following spring.' What is the primary topic of the passage?
Answer and explanation
Correct answer: B. The multi-generational migratory journey of monarch butterflies across North America
The entire passage focuses on the astonishing multi-generational migration of monarch butterflies from Canada and the US to Mexico.
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