The correct answer is C. manipulator.
A manipulator is a mechanical device that is used to move or position objects. It is typically made up of a series of links and joints that allow it to move in a variety of ways. Manipulators are often used in industrial settings to automate tasks such as assembly, welding, and painting. They are also used in medical settings to perform surgery and in research settings to conduct experiments.
An end effector is the part of a manipulator that comes into contact with the object being manipulated. It can be a simple gripper, a tool, or a sensor.
An actuator is a device that converts energy into motion. It is used to move the links and joints of a manipulator.
A servomechanism is a closed-loop control system that uses feedback to control the position, velocity, or acceleration of a mechanism. It is often used in manipulators to ensure that they move smoothly and accurately.
E is not the correct answer because it is not a term that is used to describe a robot’s “arm”.