Correct option is C
Brass is a
metal alloy (made primarily of copper and zinc) and is
not a synthetic material. It is widely used for bearing applications due to its excellent wear resistance, machinability, and anti-friction properties, but it is a
naturally occurring metallic material that is alloyed for specific purposes.
On the other hand, materials like
plastic,
nylon, and
Teflon are
synthetic materials created through chemical processes and are commonly used in modern bearings for their low friction, lightweight, and self-lubricating properties.
