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Raynaud's phenomenon refers to an ailment featured by blood vessel unusuality resulting due to overactivity of the smooth muscle in the wall of arteries, causing spasms (vasospasms with constriction) of the small vessels, which supply blood to the legs, arms, feet, and hands, and sometimes the nose and ears.
Thromboangiitis obliterans, also known as Buerger's disease and vasculitis, is characterized by thrombosis and inflammation of the small and medium arteries of the feet and legs that recurs and advances in phases.
Coral bleaching is essentially when a coral turns white because the temperature is too hot for it to survive. It will continue to occur as the temperature keeps getting higher because of global warming. All corals might die
The best and most correct answer among the choices provided by your question is the first choice or letter A.
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An advantage of electron microscopes compared to light microscopes is that electron microscopes allow you to view living cells, while light microscopes do not.</span>
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