A cause-based recommendation aims to address the root cause of an issue to prevent its recurrence. By recommending the removal of inappropriate user access, the audit report is identifying the underlying problem (the granting of inappropriate access) and suggesting a solution that will help prevent this issue from happening again. This type of recommendation is focused on mitigating risks by addressing their causes, thereby strengthening the control environment.
Reference:
The Institute of Internal Auditors (IIA), Practice Guide on Writing Audit Reports
"Internal Auditing: Assurance and Advisory Services" by Urton L. Anderson et al.