An actin gene in humans is 92% identical to the homologous actin gene in mice. An actin gene in humans is 80\% identical to the homologous gene in yeast . What does this say about how long ago these organisms had a common ancestor ?

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.