Fact 1: Earth 's tilt on its rotating axis causes seasons to change. Fact 2: During that time the seasons change from fall to winter to spring to summer. Given the two facts above, earth 's tilt on its rotating axis causes fall to change to what?

Select from:
[a]. winter.
[b]. break off.
[c]. Inches.
[d]. cold.
[e]. autumn.
[f]. spring.
[g]. fall permanently.
[h]. nothing.
The answer is:
[a].