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6. The four main systems of the Earth are

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



Answer :

iGreen
Geosphere, hydrosphere, atmosphere, and biosphere.

Therefore, the correct answer is D.

D. geosphere, atmosphere, hydrosphere, and biosphere.

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