Which of the following is responsible for the mechanical part of a robot?

1. Giving shape to the robot
2. Allowing interaction with outer environment
3. Protecting robot's electronic part
4. All of the above

All of the above

Reason — The mechanical block of a robot provides its outer body and helps in interacting with its outer environment. It also creates the physical framework of a robot, allowing integration of different components and supporting them, thereby protecting the electronic parts.