Final answer:
Compliance with the sizing rule for robots is checked through physical measurement, using tools like tape measures or sizing boxes, and weight is checked using scales, to ensure adherence to competition guidelines.
Step-by-step explanation:
Compliance with the sizing rule for robots will typically be checked by the organizers of a robotic competition or event. The verification process often involves physically measuring the dimensions of the robot using tools such as tape measures, calipers, or sizing boxes to ensure they fit within the specified size constraints. Additionally, weight limits may be checked using scales. These checks are usually done at the beginning of the competition and can be repeated if the robot undergoes significant modifications. It is crucial for teams to adhere to the specified sizing guidelines to ensure fair competition and to avoid being disqualified.