What is referred to as the actual robot arm in industrial robots?

The correct choice is the manipulator, which refers to the actual robot arm in industrial robots. This component is responsible for executing various tasks such as picking, placing, welding, or assembling items. The manipulator's design typically resembles an arm that can reach and operate in multiple dimensions, enabling it to perform a wide range of functions in an industrial setting.

The manipulator includes several joints and links, allowing for flexibility and movement. It is the part of the robot that interacts directly with objects, making it essential for the operational capabilities of the robot. Understanding the role of the manipulator helps in grasping how industrial robots perform their designated tasks and how they can be programmed for efficiency and precision in manufacturing processes.