A. Antarctica
B. Australia
C. Oceania
D. Africa
🧠 Explanation:
Australia is the smallest continent in the world by land area, spanning about 7.7 million square kilometers. Despite its size, it’s a diverse continent with unique ecosystems, including deserts, rainforests, and the Great Barrier Reef. Its small landmass compared to other continents like Asia or Africa makes it distinct, yet it’s home to vibrant biodiversity and indigenous cultures. Australia’s compact size doesn’t diminish its global significance in trade, tourism, and environmental conservation, making it a key focus in geography and ecological studies.