The picture shows the pinwheel that Stephen has in his backyard.
Sometimes Stephen will see his pinwheel spinning, but other times it does not spin. Which statement best explains what makes his pinwheel spin?
a
The Sun heats up the pinwheel, causing it to turn.
b
The colors on the wheel repel one another, causing it to turn.
c
Energy from the ground shakes the wheel and makes the pinwheel move.
d
Energy from the wind pushes on the wheel and makes the pinwheel move.
d
Energy from the wind pushes on the wheel and makes the pinwheel move.