Final answer:
Most of the world's developed countries are located in the Northern Hemisphere due to historical reasons and early industrialization in Europe and North America.
Step-by-step explanation:
The majority of the world's developed countries are located in the Northern Hemisphere. This is primarily due to historical reasons, as Europe and North America have a long history of economic and technological advancements. These regions were early centers of industrialization, which led to their development and high standards of living.