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Explanation:
I think this can answer your question.
<span>The darker an eye color the more melanin the eye has. The melanin concentration in the pigment of the iris cells acts as a way to protect the iris from higher sunlight by spreading the light out. So, in other words, the lighter someone's eyes are the more sensitive they are to light.</span>
Early defibrillation has been called the critical link in the Chain of Survival because the time from collapse to defibrillation often is the key indicator of survival from sudden cardiac arrest. But the strength of the early defibrillation link depends on the strength of the the links that precede it.
Those two are the muscular system and the excretory system because you use your muscles to push up and down and your excretory system produces the sweat you use while doing them
