The total space in which the robot can move without restrictions is known as:

• A. Restricted Space
• B. Maximum Space
• C. Operating Space
• D. Expanded Space

Answer: (B)

The main idea is the robot’s movement envelope—the full set of positions it can reach and move to when there are no external boundaries or obstacles. This represents the largest possible operational area defined by the robot’s geometry and joint limits.

Among the options, the term that best conveys that unrestricted, full-reach concept is the one that means the maximum extent of movement available to the robot. It directly communicates the idea of the largest possible space the robot can operate in. The other terms imply limitations or different notions: a restricted space suggests boundaries or constraints; expanded space isn’t a standard term for this idea; operating space can refer to the region the robot currently works within, often under active constraints, rather than its absolute maximum reach.