PLEASE ANSWER!!Why is the earth divided into 4 hemispheres?

There are differences in the climates of the Northern and Southern hemispheres because of the Earth's seasonal tilt toward and away from the sun. ... The prime meridian, or 0 degrees longitude, and the International Date Line, 180 degrees longitude, divide the Earth into Eastern and Western hemispheres.

There is differences between the hemispheres

Answerscripps institution of oceanography; i believe this is correct plz check first good luck;

Answerequatorial guinea,gabon, and western sahara;