To enforce data security in a Power BI report, what feature can be utilized?

Row-level security is the feature utilized to enforce data security in a Power BI report by allowing different users to see data that is relevant specifically to them. This is particularly important in scenarios where sensitive information is involved, and organizations need to ensure that users only access data that they are authorized to see.

With row-level security, you can define roles and rules in Power BI Desktop, controlling access to rows in a table based on the user viewing the report. When a user accesses the report, Power BI applies the defined security rules, dynamically filtering the data they can see based on their identity. This enhances data security and compliance with privacy regulations.

The other options, while useful in their own contexts, do not serve the same purpose. Visual filters impact the data presented in visuals for all users but do not restrict access based on user identity. Data connectors are involved in connecting to the data sources but do not provide security features themselves. Custom themes allow for aesthetic and branding modifications to reports but do not influence data access or security.