What standard resource can be used in creating a user interface in Salesforce?

Visualforce is a standard framework provided by Salesforce for building custom user interfaces. It allows developers to create pages that can be hosted natively on the Salesforce platform, leveraging Salesforce's powerful back-end infrastructure. Visualforce works using a markup language that is both similar to HTML and allows for the inclusion of various web components, enabling the integration of complex business logic, data manipulation, and dynamic page behavior.

This framework provides a wide range of standard components for building user interfaces, such as input fields, buttons, data tables, and more, which can be customized to meet specific business needs. Additionally, Visualforce pages can easily interact with controllers written in Apex, which process the application logic and handle data operations.

Other options, while related, do not serve as standard resources for creating user interfaces in the same way. Web Pages may refer to general web development practices, but they don't specifically integrate with Salesforce functionality. Apex Page is a term that might be confused with Visualforce, but it does not refer to a separate standard framework for interface design. Custom Objects are data structures used to store information in Salesforce but are not used for UI development.