Thank you so much. Your contribution is quite helpful since I am not a native :)

Specifying from one line to another is a typical use case for this option.

It is left unchanged, but probably should be made more clear.

The purpose of this statement is to emphasize that the -z option is useful for treating multiple lines as a single input. For instance, it enables the targeted command to process the contents from line A to line B inclusively as one unified input.

I have reviewed the sentence and agree that the current explanation is somewhat difficult to understand. I'm considering revising it as follows:

Before:
Specifying from one line to another is a typical use case for this option.
After:
This option is useful for treating multiple lines as a single combined input.

Ho do you think about it?

This option is useful for treating multiple lines as a single combined input.

Very clear!