What warning signs were there that dan had skin cancer?

Dan had a suspicious mole located on his body. The mole continued to grow in size which should have been a clear warning sign to Dan that he should have went to the doctor. Cancer moles change in shape and color and cause pain and bleed when irritated. Dan had these symptoms, but ignored them.

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.