ROSTOPIC uses . . . . . . . . at the command line for representing the content of the message.

yaml_syntax
rostopic bw
rostopic delay
rostopic echo

The correct answer is: A. yaml_syntax

ROSTopic uses YAML syntax at the command line for representing the content of the message. YAML is a human-readable data serialization language. It is easy to read and write, and it is supported by many programming languages.

The other options are incorrect.

  • B. rostopic bw is a command-line tool that can be used to measure the bandwidth of a ROS topic.
  • C. rostopic delay is a command-line tool that can be used to measure the latency of a ROS topic.
  • D. rostopic echo is a command-line tool that can be used to echo the contents of a ROS topic.