The changing seasons are caused by the changing position of the Earth in relation to the Sun. The seasons keep changing because the tilt of the Earth’s axis never changes while the Earth circles the Sun. The inclination of the Earth’s axis of rotation to the orbital plane coupled with the yearly revolution around the Sun produces the changing weather patterns called the seasons.
One way to understand this is to picture which way the tilt of the axis causes the North Pole to slant at different times of the year. When the North Pole slants toward the Sun, the Northern Hemisphere receives the most sunlight and it is summer there. When the pole slants away from the Sun, the Northern Hemisphere receives the least sunlight and it is winter. Spring begins when the pole starts to slant toward the Sun, and autumn begins when the pole starts to slant away again.
Qusetion:
When the pole starts to slant toward the Sun, it is … .
a) spring
b) summer
c) autumn
d) winter
Please write your answer in comments section.