Question

Component is separated from codebase

Answer 1

I don't know please ask questions of any other subjects except this

Answer 2

A component is separated from its codebase in order to address the issues of complex monolithic codebases. The code base can be decomposed to have smaller separate components such as libraries or services without altering its functionality.  

The code base instead of being huge, single system becomes distributed with multiple components or separate binaries like the Linux kernel. Separation of components helps to manage the repositories by keeping them small.