What is the primary function of sensors in robotics?

• A. To provide feedback and information about the robot's environment and operational status.
• B. To increase the robot's payload capacity.
• C. To replace the need for control software.
• D. To generate power for actuators.

Answer: (A)

Sensors provide feedback and information about the environment and the robot’s own operational status, which is essential for closed-loop control. This data lets the robot detect obstacles, determine position and orientation, monitor forces, and check conditions like temperature or joint angles, so the control system can adjust motor commands in real time. Without this information, the robot would have no way to verify what’s happening or correct its actions, making autonomous and safe operation much less reliable. While other options touch on different aspects of robotics, they don’t describe what sensors actually do: they don’t physically increase payload, they don’t replace the control software, and they don’t generate power.