Which of the following actions can a Declare Expression perform?

A Declare Expression is a powerful feature in Pega designed to automatically manage and derive values for properties based on specified criteria or calculations. This dynamic behavior allows for properties to maintain their accuracy and relevance as data changes, ensuring that the application reflects the most current information without the need for manual updates.

Among the options provided, automatically updating a property's value is a core function of a Declare Expression. It continuously evaluates based on the defined conditions and updates the property real-time whenever any relevant change occurs in related properties. This capability supports maintaining data integrity and eliminates the need for additional user intervention, thus enhancing overall efficiency in application performance.

The other options relate more to different functionalities within Pega. While triggering scheduled actions involves the use of agent rules or other mechanisms, enforcing data access restrictions pertains to role-based access control configurations. Lastly, formatting a user interface is typically handled through UI rules and styling rather than through Declare Expressions.