What task is required before an administrator can delete a member from an ArcGIS Online organization?

Before an administrator can delete a member from an ArcGIS Online organization, it is crucial to delete or change the ownership of groups and content owned by the member. This is because all content and groups associated with a member are tied to that individual's account; when a member is deleted, any content they own could potentially become orphaned or inaccessible if not properly reassigned or removed.

By ensuring that all groups and content are either transferred to another member or deleted, the organization maintains continuity and data integrity. This step prevents situations where critical data may be lost or inaccessible after the member's account has been removed.

The other options relate to managing licenses or access rights, which, while important for overall organization management, do not specifically address the need to handle content and groups tied to the member prior to their deletion. Thus, focusing on the ownership of content and groups is the necessary step for a successful removal process.