In the context of outdoor robot deployment, what does 'uneven terrain' refer to?

Uneven terrain refers to variations in surface height, which can include hills, valleys, rocks, and other obstacles that can affect how a robot navigates in outdoor environments. Robots are designed to perform tasks in a variety of settings, but they must be equipped to handle the challenges that uneven surfaces present. This involves having features such as appropriate wheel or track designs that allow for stability and mobility over bumps and dips in the ground. Understanding uneven terrain is crucial for programming robots to deal effectively with environmental challenges and ensuring that they can operate accurately and safely. In contrast, the other options do not specifically address the physical characteristics of the terrain that influence outdoor robot performance.