Which capability is associated with external services?

The capability associated with external services primarily focuses on the ability to connect to an external endpoint to bring data into Salesforce. This involves establishing requests to external systems or APIs, allowing Salesforce to consume data services that exist outside of its native environment.

This connection enables the integration of additional functionalities, enhancing Salesforce's usability by incorporating data from third-party applications or services without requiring extensive custom development. External services thereby facilitate seamless data interaction and support real-time data retrieval, which can be crucial for various business operations, such as pulling customer information, updating records based on external triggers, or integrating analytic services.

The other options do not fit the context of external services. Defining user access levels relates to permission management within Salesforce, creating internal objects involves data structures within the platform, and developing Apex classes pertains to custom code for interacting with Salesforce’s platform and database rather than connecting with external services.