Answer:
C. The fact that Earth rotates around its axis
Explanation:
The seasons are caused by the tilt of the Earth's rotational axis away or toward the sun as it travels through its year-long path around the sun. The Earth has a tilt of 23.5 degrees relative to the "ecliptic plane"
The inner core is mainly made up of hot metals
The earth tilts for different times of the year. During the summer Alaska is a lot closer to the sun than florida.