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Which basic condition was fulfilled on Earth after the hydrosphere formed?

Answer and explanation

Correct answer: Availability of liquid water

The governing concept is the development of the hydrosphere during Earth’s early evolution. The hydrosphere includes Earth’s oceans, rivers, lakes, groundwater, ice, and water vapour. Its formation meant that water could exist and remain available on the planet in liquid form, especially after cooling and condensation of atmospheric water vapour. Liquid water is a fundamental requirement for known life because it supports chemical reactions, transport of dissolved substances, and stable environmental processes. Therefore, option B is correct. Metal rain is not the relevant condition, while cities and railways are much later human developments.

Related tags

HydrosphereLiquid WaterEarth EvolutionEvolution Of The EarthThe Origin And Evolution Of The EarthGeographyClass 11 Mcq

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