One important advantage that primary soruces have over secondary sources is that primary sources offer a firsthand account of an event - b, which isn't the case with secondary sources. Although this leaves primary sources prone to being biased compared to secondary sources.
Answer and Explanation:
Yet the Incas, and the civilizations before them, coaxed harvests from the Andes' sharp slopes and intermittent waterways. They developed resilient breeds of crops such as potatoes, quinoa and corn. ... The ghost of the Incas' farming achievements still shadows the Andes.
U.A.E got it's independence on 2nd December 1971.
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