What do scientists estimate is the approximate age of earth ?
a. 660 million years
b. 3.5 billion years
c. 4.6 billion years
d. 12.2 billion years

b, acidosis

acidosis is when the human body attempts to return the bloods ph levels back to normal when the blood is acidic

the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

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