The continent known for having the most species of living organisms is South America. The Amazon Rainforest, which spans several countries in this continent, is a key area of biodiversity, hosting millions of species of plants, animals, and microorganisms. This rich diversity is attributed to the continent's varied ecosystems, ranging from tropical rainforests to mountainous regions. South America's complex geographic features and climate zones contribute to its high levels of endemism, where species are found nowhere else on Earth. Conservation efforts are crucial in protecting this biodiversity from threats like deforestation and climate change.