Answer:
The seasons of the year
Step-by-step explanation:
The earth is not a perfect sphere as it is flattened at the poles. It is approximately an ellipsoid.
For didactic purposes, as the flattening of the earth's poles is insignificant, the earth's surface is considered as a globe: the earth's globe, which represents the earth as a sphere.
The plane that passes through the center of the spherical surface and is perpendicular to the polar axis is called the plane of the equator.
Equator is the intersection of the plane of Equator with the spherical surface. Ecuador is therefore a maximum circumference.
The equator line is an imaginary line from responsible for dividing the globe into two hemispheres:
Southern Hemisphere, also called southern or southern.
Northern Hemisphere, also known as Northern or Boreal.
A season actually begins when planet Earth and the sun are in a position where the sun's rays strike perpendicularly to the equator (spring and fall) or to one of the tropics (summer and winter).