What do scientists often use to study microevolution?

Microevolution, by definition, is a continuous transformation of quality recurrence inside a populace over some undefined time frame. These are moderate and unpretentious changes yet can have huge effect on it's species, consequently the investigation of such should be sensitive and chivalrous. 
Microevolution can happen because of one of the accompanying 
Transformation 
Determination 
Hereditary float 
Quality stream 
To comprehend, examine and think about this procedure, researchers utilize "Population genetics" as their foundation for investigation. This, in itself, is a method of concentrate the different and consistently changing examples of dispersion in allele frequencies inside an animal varieties. Basically, the investigation of this work includes a blend of lab work, field work and hypothesis. It likewise includes examining the course, change and development of quality frequencies over some undefined time frame. The information, investigation and discoveries are regularly put away as information computationally.

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.