Based on the topics covered in this chapter, answer the following questions:
- What element of a robot is used to monitor its environment?
 - What type of robot element do motors represent?
 - What are the three elements of a robotic system?
 - Where have robots been operating the longest in regular usage?
 - Why are wheels used more often than legs?
 - What is the principle connecting output, input, and control in a loop?
 - Why might a household washing machine be considered more robotic than a UK Robot Wars entry?