Which system is primarily for exchanging information with humans and is also used to exchange information with other robots and machines?

• A. Mechanical System
• B. Communication System
• C. Sensory System
• D. Structural System

Answer: (B)

The key idea here is how information gets exchanged. A communication system is designed to send, receive, encode, and interpret data so humans can interact with the robot and other machines can share information with each other. In practice, this includes human–machine interfaces like control panels or voice commands, as well as machine–to–machine links that transmit commands, telemetry, and sensor data over networks or protocols. That dual capability—talking to people and talking to devices—is what makes it the best fit for this question.

The other options map to different roles: a mechanical system focuses on motion and forces, a sensory system is about detecting environmental data, and a structural system provides the robot’s physical frame.