Which of the following is not a part of the digestive system
A. duodenum
B. spleen

B. Spleen
Hope this helps :)

Even though it’s located fairly close to the digestive system, the spleen is not part of the digestive system.

Ithink the answer is d.

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.