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Which is NOT an example of external noise?
Minerals
Naturally occurring, inorganic solid substances with a defined chemical composition and crystalline structure, found in the earth's crust.
Lithosphere
The rigid outer layer of the Earth, consisting of the crust and the uppermost mantle, involved in tectonic activities.
Troposphere
The lowest layer of Earth’s atmosphere, where weather occurs and the majority of airborne pollutants are concentrated.
Hot Air Balloon
is a lighter-than-air aircraft consisting of a bag, known as an envelope, which contains heated air that provides lift, allowing it to float in the atmosphere.
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