Choose your answer from:
[i] Space travel.
[ii] recovery time from fatigue.
[iii] Earth orbiting the Sun.
[iv] sunlight.
[v] earthquakes.
[vi] Solar energy.
[vii] prolonged thirst.
[viii] global warming.
Q: Fact 1: Earth orbiting the Sun causes seasons to change. Fact 2: Days and hours change seasonally. Given the two facts above, what causes days to change?
A:
[iii]