The positions of the constellations appear to change throughout the year because ____. a. Earth revolves around the Moon b. Earth revolves around the Sun c. the constellations revolve around Earth d. the Sun revolves around Earth

Let's first exclude the false statements: only moon revolves around the Earth, not the Sun and not the other constellations. So the following are false: a. Earth revolves around the Moon c. the constellations revolve around Earth d. the Sun revolves around Earth Which actually leaves us with the correct answer: b. Earth revolves around the Sun