Why did scientist divide the world into 4 different hemisheres?

Scientists divided the world into four different hemispheres—Northern, Southern, Eastern, and Western—to facilitate the study of geography, climate, and natural phenomena. This division helps in understanding global patterns such as weather systems, ocean currents, and biodiversity. By categorizing the Earth in this way, researchers can more easily analyze data and make comparisons across different regions. Additionally, these divisions aid in navigation, mapping, and educational purposes.