The present is key to the past (B)
<span>The sun has six layers. Three layers, the corona, chromosphere and photosphere, comprise the sun's atmosphere or outer layer. The other three layers, convective zone, radiative zone and core, comprise the inner layers, or the parts of the sun that are not seen. <span>Fusion is the process that powers the sun and the stars.</span></span>
<span>Lowered cardio-respiratory fitness is one of the best predictors. By not being in shape and having a weakened heart and lungs, one stands less of a chance of surviving issues that arise in these systems. Including a small amount of exercise in one's routine can alleviate many of the risks inherent with this lack of fitness.</span>
I'm sure the answer would be-
A. Iran.
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