Many diseases are caused by viruses or bacteria, which may be considered introduced species under certain circumstances (although viruses are not truly living organisms and need another organism as a host). describe the following exotic diseases and explain their origins.
1.smallpox
2.chestnut blight
i don't need you to do it for me i just need .

Smallpox- began Africa, spread through trade and human interaction.
Chestnut blight-isn't this a chestnut found in America?

I'm soooo sorry but i can't answer but you can ask another professor

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.