Continent: Continents are the largest landmasses on Earth's surface. There are seven continents - Africa, Antarctica, Asia, Europe, North America, Oceania (or Australia), and South America.
Megalopolis: A megalopolis is a highly urbanized and densely populated region consisting of several large cities and their surrounding areas. Examples include the Northeast Megalopolis in the United States or the Pearl River Delta in China.
Biome: A biome refers to a large-scale ecosystem characterized by similar climate, vegetation, and animal life. Examples include tropical rainforests, deserts, tundras, or grasslands.