Which of the following countries has the longest coastline in the world?

🧠 Explanation:

Canada has the world’s longest coastline, stretching over 243,000 km along the Pacific, Atlantic, and Arctic oceans. This vast coastline supports fisheries, trade, and tourism. For geography or environmental science students, Canada’s coastline highlights its economic and ecological significance, making it a key topic for studying global geography, marine ecosystems, and resource management.