There are 2 lines of symmetry for that figure
Because the seismic waves in the layers are strengthen when in different materials, like denser layers. So scientists can tell there are different types of layers.
The correct answer is A) Trade winds.
Since the air balloon is just south of the Equator and it moves towards west, that means the trade winds are moving it in that direction. The trade winds are winds that are active around the Equator and there direction of movement is east-west, thus they are wind that blows to the west.