Geometry Dash World does not save game progress because it is designed to be a free, simplified version of the original Geometry Dash game. The lack of a save feature encourages players to complete levels in one sitting, making it more challenging and engaging. Additionally, the game's focus on short, quick levels may not require a save feature as much as the longer, more complex levels in the original game. Overall, the decision not to include a save feature in Geometry Dash World aligns with the game's design and intended gameplay experience. **

Yes, there are several professions that deal with the development of tanks. Engineers, specifically mechanical and automotive engineers, are involved in designing and developing the mechanical systems of tanks. Military technology experts and defense contractors also play a crucial role in the development of tanks, working on the integration of advanced technologies and weapons systems. Additionally, there are specialized roles within the military and defense industry that focus on the testing, maintenance, and operation of tanks. **

A possible topic for an internal subject examination in technology that deals with a treadmill and a light barrier could be the design and implementation of a safety system using the light barrier to prevent accidents and injuries on the treadmill. The examination could cover the principles of light barrier technology, its application in treadmill safety, and the design considerations for integrating it into the treadmill system. Students could be required to analyze potential hazards, propose safety features, and develop a prototype or simulation to demonstrate the effectiveness of the light barrier safety system. **