Simplify. -

question 30

Multiple Choice

Simplify.
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Definitions:

Mesosphere

The third layer of Earth's atmosphere, located above the stratosphere and below the thermosphere, characterized by decreasing temperatures with altitude.

Stratosphere

The layer of Earth's atmosphere located above the troposphere and below the mesosphere, known for containing the ozone layer.

Solar Activity

The phenomena that occur within the Sun's magnetically charged atmosphere, affecting space weather and climatic conditions on Earth.

Air

The invisible gaseous substance surrounding the Earth, a mixture mainly of oxygen and nitrogen.