Due to the polar nature of water molecules, when the bond, they This makes water less dense in it's frozen form than it's liquid form. *
1 point

Giga is the second highest prefix on the normal scale, the first is terra.

Just dont put scarce

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.

It is called the medulla oblongata or people usually call it medulla. it is the lower half of the brain stem continuous with the spinal cord.