Below shows data given by an electrocardiogram.

what type of data is recorded by the electrocardiogram?
a.
the amount of oxygen in the blood
b.
the force from the heart beating
c.
the sound of the heart beating
d.
the electrical activity of the heart

A: rachel carson :

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.