An airplane is flying over the South Pole. Which arrow correctly shows the direction gravity pulls the plane? (2 points) Airplane underneath Earth with four arrows around it. An arrow is pointing from the top of the plane towards space labeled one. An arrow behind the plane pointing away from the plane labeled two, an arrow below the plane pointing towards Earth labeled three, and an arrow in front of the plan pointing in the direction of the motion of the plane labeled four.

a
1

b
2

c
3

d
4