2 poin In 1847 a scientist noted that when physicians washed their hands before
they had contact with their patients, there was a decreased number of
infections. This was one of the first clues that... *
bacteria are present in water
bacteria generate spontaneously on hands
substances such as bacteria may cause diseases
O physicians deliberately infected patients

D.) domain, kingdom, phylum, class, order, family, genus, species

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.

Both of them have a nucleus, golgi apparatus, cell membrane, smooth and rough endoplasmic reticulum, lysosome, and ribosomes.

The combined mass of both