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The correct answer is that Bonjour provides a way for third-party network applications to discover shared resources in OS X. Bonjour, which is Apple's implementation of zero-configuration networking, allows devices on a local network to automatically find each other without the need for manual configuration. This includes the discovery of services such as printers, file sharing, and other network services.

Bonjour uses multicast DNS (mDNS) to enable devices to communicate and share information about available services. This capability makes it easy for applications to locate shared resources without requiring additional setup or configuration from users.

While Dynamic Service Discovery can relate to how services are found, it is not a specific component or protocol utilized by OS X as much as Bonjour is. Network Utility provides a set of tools to help you troubleshoot network issues but does not play a role in resource discovery. Server Message Block (SMB) is a protocol primarily used for file sharing in Windows environments and also supported by OS X, but it does not facilitate service discovery in the same way that Bonjour does.