3D printing is called "additive manufacturing" because:
- Amaterial is cut away from a solid block
- Bseveral materials are mixed into an alloy
- Cmaterial is added layer by layer from a digital design
- Dparts are joined by welding
Show answer and explanation
Correct answer: (c) material is added layer by layer from a digital design
Explanation
In additive manufacturing a printer adds material layer by layer, wasting little. Traditional machining is subtractive: material is cut away.