Question

which of the following systems is the layer of gas that surrounds earth? hydrosphere biosphere atmosphere geosphere submit

Explanation:

To solve this, we analyze each option:

• Hydrosphere: Water - related (oceans, lakes, etc.), not gas.
• Biosphere: All living organisms, not a gas layer.
• Atmosphere: Defined as the layer of gases surrounding a planet (Earth here).
• Geosphere: Solid Earth (rocks, minerals), not gas.

So the correct option is the one related to the gas layer around Earth.

Answer:

atmosphere (the option labeled "atmosphere" among the choices: hydrosphere, biosphere, atmosphere, geosphere)