What term describes the frozen parts of the hydrosphere?

• A. Thermosphere
• B. Cryosphere
• C. Biosphere
• D. Stratosphere

Answer: (B)

The term that describes the frozen parts of the hydrosphere is "Cryosphere." This component of the Earth's system includes all forms of ice and frozen water, such as glaciers, ice caps, sea ice, and permafrost. The Cryosphere plays a critical role in regulating global climate and sea levels, as it reflects sunlight and influences ocean currents.

The other terms refer to different aspects of Earth's systems: the Thermosphere is a layer of the atmosphere characterized by high temperatures, the Biosphere encompasses all living organisms and their environments, and the Stratosphere is another atmospheric layer located above the Troposphere, known for the ozone layer that absorbs and scatters ultraviolet solar radiation. Each of these terms describes distinct elements of Earth's structure and processes, while the Cryosphere specifically denotes the frozen water portion.