Which of the four dimensions include, the knowledge bases needed to deliver and manage services?

This includes the information and technology needed to deliver services (servers, storage, networks, databases, etc.) as well as the information and technology needed to manage those services (ITSM tools, knowledge bases, configuration information, etc.).

https://www.sysaid.com/blog/entry/everything-you-officially-need-to-know-about-itil -4