What causes day and night?
A- the tilt of earth on its axsis
B- the motion of the sun to differnt latitudes
C- the rotation of earth
D- the orbit of earth around the sun
C- the rotation of earth
The rotation of the Earth on its axis is what causes day and night. As the Earth rotates, different parts of the planet are either facing towards the sun (day) or away from the sun (night).