Seasonal changes occur when the earth moves so that the northern hemisphere and the southern hemisphere are tilted more toward or away from the sun. what happens as the earth moves so that the northern hemisphere is tilted more toward the sun? a. the amount of sunlight increases in the northern hemisphere. b. the distance from the sun decreases in the southern hemisphere. c. the average temperature decreases in the northern hemisphere. d. the length of daylight increases in the southern hemisphere.