Answer:
D. Most European nations are part of the European Union.
Explanation:
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Answer:
All animals, and humans are part of the carbon cycle. When animals eat they get carbon in the form of carbohydrates and proteins and is released back into the atmosphere as a waste product when animals breathe.
Explanation:
Answer:
The largest portion of earth is the mantle... If you're talking about Earth's surface it's water...
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Answer:
See below
Explanation:
From Nasa:
"Understanding the planets and small bodies that inhabit our solar system help scientists answer questions about its formation, how it reached its current diverse state, how life evolved on Earth and possibly elsewhere in the solar system, and what characteristics of the solar system lead to the origins of life."
Global warming, loss of natural habitats, extinction of multiple species, etc