what are the differences between relocation and expansion diffusion. explain and give a real world example of the different types and subtypes of diffusion using geographic examples

Some connecting rods have to lubricate the cylinder wall or piston pin. the answer is letter d. graphite coating can be a major  additive to many  coating  systems and things such as connecting rods.  it functions as a refractory, lubricant, thermal conductor, and electrical conductor for a machine or thing to enhance its work.

Gps = global positioning system, gis =  geographic information systems