How can the atmosphere be considered part of the hydrosphere?

it is a source of water
it blocks Ultraviolet rays from the sun
it contains oxygen necessary for life on earth
it traps pollutants that would otherwise harm the earth

7th grade science

It is a source of water  

Explanation:

water vapor could be considered part of the atmosphere as well as part of the hydrosphere: Water vapor is considered part of the hydrosphere because it's water.

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.