How do the Preserve Shape Using: "Clipping Mask" "Transparency" options of the envelope distort panel work?

Question

Adobe Illustrator

What is an example of how they work?

Answer 1

And again, you should first use the search and find the first line in the search results in Russian ( in the original in English), where all the parameters are described in detail.
Original
Russian variant
They translated strangely, but the essence is clear. The form is not protected, of course, but saved.