Er Sem A
The Study of Earth Science
Practice
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Earth is comprised of four systems, or spheres. Which of these spheres do each of the five branches of Earth Science study?

Geosphere - The Earth and its features

Hydrosphere - The Earth's water, in any form

Atmosphere - The "gaseous envelope" that surrounds the Earth

Biosphere - The living plants, animals, and other organisms that inhabit the Earth

Hope this helps :)

answer; i believe the answer is (25%)plz check first good luck;

b.

developed countries have tended to improve the environment, while developing countries have tended to damage it.