Answer:
Raw Materials
Step-by-step explanation:
A prosthesis system should be lightweight in the first place, and thus much of it is plastic. Typically the socket is made of polypropylene. Most of the steel in the pylon has been replaced by light metals such as titanium and aluminum. The most commonly used alloys of these materials.
Various plastics currently act as the most popular materials in prosthesis, but conventional materials like wood, leather, metal and towels also play a part.