Answer:
Glucose is the bodies primary form of fuel
Explanation:
40 years, the color just provids whether or not it was a wet year
Water evaporates and comes down as rain thats how the water cycle works and the carbon cycle works by oxygen being turned into carbon by humans and animals breathing and trees convert carbon back into oxygen so the cycle goes on and on
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They get energy from the sun by eating animals who eat plants.
Black sand is typically found in them