Answer :
Since a vacant piece of land can be used to produce goods and services, it is a factor of production.
Since the antique sewing machine is used to produce clothing, it is a factor of production.
Since Randy is using his labor as a mechanic, his time and effort are factors of production.
This means that all of the above are factors of production.
Since the antique sewing machine is used to produce clothing, it is a factor of production.
Since Randy is using his labor as a mechanic, his time and effort are factors of production.
This means that all of the above are factors of production.