Which aspect of Salesforce B2C Commerce allows for customization of user interaction?

The aspect of Salesforce B2C Commerce that allows for customization of user interaction is cartridges. Cartridges are modular units of code within the Salesforce B2C Commerce platform that bundle functionalities like business logic, templates, images, and other related resources. By creating and modifying cartridges, developers can tailor the shopping experience according to specific business requirements and user preferences.

This customization can include altering product display, checkout processes, and user interface designs, ultimately creating a unique experience for customers. Cartridges offer the flexibility to develop custom features or enhance existing functionality, making them a powerful tool for developers in optimizing user interactions on the platform.

Other aspects such as API calls, preferences, and security settings serve different functions; API calls manage data retrieval and communication between systems, preferences configure various aspects of the application environment, and security settings define rules around user data protection and access controls, none of which specifically focus on the user interaction aspect like cartridges do.