A machine __ is a device that is designed to keep the operator clear of dangerous machine par Barrier Guard Rest Emergency stop

## Step 1<br />The problem is asking us to identify the correct term that describes a device designed to keep the operator clear of dangerous machine parts. The options provided are "Barrier", "Guard", "Rest", and "Emergency stop".<br /><br />## Step 2<br />We need to understand the meaning of each term. A "Barrier" is a physical obstruction that prevents access to a dangerous area. A "Guard" is a device that covers dangerous parts of a machine to prevent access. A "Rest" is a period of inactivity or pause, and an "Emergency stop" is a device that can be used to immediately stop a machine in case of an emergency.<br /><br />## Step 3<br />Based on the definitions, the term that best fits the description of a device designed to keep the operator clear of dangerous machine parts is "Guard". This is because a guard is specifically designed to cover dangerous parts of a machine, preventing the operator from coming into contact with them.