Final answer:
Jacques Cartier's primary strength was his expertise in navigation and map-reading, which was crucial for his explorations leading to French claims in North America.
Step-by-step explanation:
One of Jacques Cartier's notable strengths was his navigation and map-reading expertise. As a French explorer who made three voyages to what is today Canada, his ability to navigate across the Atlantic and chart the St. Lawrence River was critical to his missions and the eventual French claims in North America. His skills as a navigator allowed him to explore extensively, and establish contact with indigenous peoples, laying the groundwork for future French exploration and settlement.