The carbon cycle describes the way the element carbon moves between the Earth's biosphere, hydrosphere, atmosphere, and geosphere. It is important for a few reasons: Carbon is an essential element for all life, so understanding how it moves helps us to understand biological processes and factors that influence them.
Source: Google
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Answer:
D. Predator-prey!
Hope This Helps! And that I wasn't too late!
It just depends what you are studing:
A+,A-,O+ and O- can give to blood type A+
