The term 'Sphere of Interest' can be broken down into three words: WORLD, ARENA, and AREA. The word WORLD refers to the entire planet and all its inhabitants. The word ARENA is used to describe a place where people come together to compete or perform, such as a sports stadium or theater. Finally, the word AREA is used to refer to a specific region or location. Together, these three words form the phrase 'Sphere of Interest, ' which is used to describe a particular AREA of focus or expertise.