Final answer:
Geothermal is the type of fuel that can only be used in certain geographic areas due to specific geological conditions.
Step-by-step explanation:
The type of fuel that can only be used in certain geographic areas is Geothermal. Geothermal energy is generated by harnessing the heat from the Earth's interior. It requires specific geological conditions, such as proximity to volcanoes or hot springs, to be a viable energy source. For example, Iceland has a lot of geothermal energy resources due to its geology, while countries without geothermal activity may not be able to use this type of fuel.
Learn more about Geographic suitability of different types of fuel