Which type of mail would you select for sending educational materials between libraries?

Choosing Library Mail for sending educational materials between libraries is appropriate because this specific category of mail is designed exclusively for libraries, educational institutions, and certain non-profit organizations. Library Mail allows for the mailing of books, educational resources, and other specialized materials at a reduced postage rate. This makes it both cost-effective and efficient for libraries to exchange educational materials, promoting resource sharing and accessibility.

Other types of mail, while they may be useful for various purposes, do not offer the same benefits tailored for libraries. For instance, Standard Mail is intended for bulk advertising materials and might not be suitable for educational content. Priority Mail provides faster shipping but at a higher cost and is generally used when time-sensitive delivery is needed. First Class Mail, while reliable and quick, does not have the specific cost advantages or guidelines for the type of materials being exchanged between libraries that Library Mail offers.