Russian psychologist lev vygotsky was particularly interested in how the affects a child's cognitive development.

True because work is more professional and you need specific skills. in your personal life you need different skills such as maintaining relationships.

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.

The answer to your question is c