Ahuge amount of water − 7 to 9 l − moves from the blood into the bowel every day, through osmosis and digestive secretions. since people only have 5 l of blood, why don't they die from losing all the water from their blood into the bowel? the reason is that, in a healthy person, as the food and ions move down the bowel, they are absorbed into the blood. what will the water do then?

The event order should be:

1. Ingesting food, the small bowel filled with food solutes and become hypertonic. It will attract water from the blood which is hypotonic
2. Food digested, some of it absorbed. The osmotic pressure inside bowel will be reduced.
3. All food is absorbed, the osmotic pressure reduced significantly makes it hypotonic. The blood attracts water as it is hypertonic. This will increase the blood volume

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.