Question

fill in the blank question the production combinations that fall directly on the production possibilities frontier (curve) are and efficient. (use one word to fill in the blank) need help? review these concept resources.

Explanation:

Points on the production possibilities frontier represent output combinations where all available resources are fully utilized, meaning they are attainable, and no resources are wasted, so they are efficient. The required single word describes the attainable nature alongside efficiency.

Answer:

attainable