The purpose of the release management practice is to make new and changed services and features available for use.
Release: A version of a service or other configuration item, or a collection of configuration items, that is made available for use.
https://wiki.process-symphony.com.au/framework/lifecycle/process/release-management-itil-4/

Explanation
A guiding principle is a recommendation that provides universal and enduring guidance to an organization, which applies in all circumstances, regardless of changes in its goals, strategies, type of work, or management structure.
https://www.bmc.com/blogs/itil-guiding-principles/#:~:text=A%20guiding%20principle%20is%20a,of%20work

Reference: https://www.bmc.com/blogs/itil-management-practices/

Explanation
The purpose of the change enablement practice is to maximize the number of successful IT changes by ensuring that risks have been properly assessed, authorizing changes to proceed, and managing the change schedule.