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
Hope this helps you :)
They are made of DNA so it's B
The group in an experiment that all the conditions stay the same is the control group.
Since acid is less than 7, you'd want the remedy to be more than 7.
