At which stage of life do physical abilities reach their peak?

The appropriate response is Young adulthood. A youthful grown-up is for the most part a man in the age scope of 20 to 39 (or 40), despite the fact that definitions and assessments, for example, Erik Erikson's phases of human advancement, differ. The youthful grown-up stage in human improvement goes before center adulthood. A man in the center adulthood arrange ages from 40 (or 41) to 64.

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Ibelieve the answer is relative humidity  because it makes more sense that way. solar flares usually occur in space it doesn't affect the earth, well it could but it wont make a significant damage.  latitude is land it doesnt do anything. prevailing winds, i dont know the correct meaning for this but i doubt that affects the land so it has to be relative humidity.