Question

The four main systems of the Earth are
a. geology, meteorology, oceanography, and chemistry.
b. geosphere, atmosphere, hydrosphere, and biosphere.
c. aromatherapy, biology, chemistry, and physical properties.
d. geosphere, atmosphere, hydrosphere, and aerosphere.

Answer 1

b.geosphere,atmosphere,hydrosphere,and biosphere

Answer 2

geosphere, atmosphere ,hydrosphere and biosphere are the four main systems of the earth