An advantage of __ welding is that a variety of metal types and metal thicknesses can be joined with one machine. a. gas metal arc b. flux cored arc c. oxyacetylene d. shielded metal arc

## Step 1<br />The question is asking us to identify which type of welding allows a variety of metal types and thicknesses to be joined with one machine. The options provided are gas metal arc, flux cored arc, oxyacetylene, and shielded metal arc.<br /><br />## Step 2<br />Gas metal arc welding (GMAW), also known as MIG (Metal Inert Gas) welding, is a versatile welding process that can be used to join a variety of metal types and thicknesses with one machine. This is because GMAW uses a continuous wire feed as an electrode and an inert gas to shield the weld from contamination.<br /><br />## Step 3<br />The other options, flux cored arc welding, oxyacetylene welding, and shielded metal arc welding, are also types of welding processes. However, they are not as versatile as GMAW in terms of the variety of metals and thicknesses they can join with one machine.