Final answer:
Industrial robotic arms must be housed in cages or completely shut off when workers are nearby, and force-sensing and disturbance recognition capabilities help in ensuring human safety.
Step-by-step explanation:
Industrial robotic arms must be housed in cages or completely shut off when workers are nearby because they are not aware of their surroundings and can easily injure humans. This is where force-sensing and disturbance recognition capabilities are extremely useful. These capabilities allow the robotic arms to detect forces applied on them and recognize disturbances in their environment, enabling them to react and avoid causing harm to humans.