The largest ecosystem of the Earth is –

A. Biome
B. Hydrosphere
C. Lithosphere
D. Biosphere
Answer» A. Biome
Explanation: Biomes are climatically and geographically defined as similar climatic conditions on the Earth, such as communities of plants, animals, and soil organisms, and are often referred to as ecosystems. Some parts of the earth have more or less the same kind of abiotic and biotic factors spread over a large area, creating a typical ecosystem over that area. Such major ecosystems are termed as biomes.
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