What report shows the members of a user-based security group and the permissions the security group possesses?

The report that displays the members of a user-based security group along with the permissions that group possesses is the View Security Group report. This report is specifically designed to provide comprehensive information regarding the security group's structure, including its members and their associated permissions.

Having visibility into this information is crucial for administrators to ensure proper security management and compliance within the organization. This enables them to monitor who has access to what data and maintain the appropriate levels of access as per the organization's policies.

In contrast, the other options focus on different functionalities. For example, one option relates to assigning users to security groups, which does not provide insights into existing members and their permissions. Another option deals with maintaining permissions, which while relevant to managing access, does not provide a summary of the group’s current composition or properties. Thus, "View Security Group" is the most suitable choice for identifying both the members of a user-based security group and the permissions they hold.