An H-R diagram or known as "The Hertzsprung Diagram" is a graphical tool that astronomers use to classify stars according to their luminosity, spectral type, color, temperature, and evolutionary stage.
The type of payment structure that PPOs usually offer in their contracts with providers is called Discount fee.
<h3>What is preferred provider organization?</h3>
This is an insurance service that is designed for health.
Individual, family can register under this plan to get a discounted health treatment. There is usually an agreement on this plan.
Therefore, The type of payment structure that PPOs usually offer in their contracts with providers is called Discount fee.
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Answer:
What brought an end to efforts during the late thirteenth century to form an alliance of European states and the il-khanate of Persia aimed at crushing Islamic forces in the eastern Mediterranean
Explanation: