Which statement is true? in economics, land refers to all the natural resources found on land alone. in economics, capital includes only tangible objects used for production. a point on the ppc indicates maximum utilization of available resources. a point under the ppc indicates overutilization of available resources.

The best answer is 
A point on the PPC indicates maximum utilization of available resources.

The PPC is a representation of the maximum outputs, usually as a tradeoff between two goods, given maximum utilization of available resources. Naturally, producing one good leaves less resources and other inputs available for another good.