Which statement is true

1) The phases of the moon are caused because sometimes the moon is in the Earth's
shadow

2) The phases of the moon is a result of the moon shinning different amounts of its own
light

3) We see different phases of the moon because the moon travels along its orbit around
the Earth and see different amounts of the illuminated half

4) We see different phases of the moon because different amounts of the moon is
illuminated by the sun