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The four main systems of the Earth are

A. geosphere, atmosphere, hydrosphere, and biosphere.
B. geology, meteorology, oceanography, and chemistry.
C. geosphere, atmosphere, hydrosphere, and aerosphere.
D. technology, biology, chemistry, and physical properties.

2 Answers

7 votes
A. geosphere, atmosphere, hydrosphere, and biosphere.
User Mathieu Marques
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7 votes
A. geosphere, atmosphere, hydrosphere, and biosphere.
User Syed Tayyab Ali
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