I bought a guitar chart and it has this figure for moveable minor pentatonic scale:

I know the number 1 box pattern of the minor pentatonic scale (Justin guitar course). I play it starting on the 5th fret to get an A minor pentatonic scale.

When trying to understand how to read the scale diagram, I came across this - The Minor Pentatonic Scale | Guitar Lesson with Diagrams. Based on the different patterns shown there, I added those boxes and numbered them.

I have 3 questions:

1. Without referring to a different source, how will I know from the scale diagram, which frets will be part of a pattern? For example, in 1 we have frets 1,2,3,4.
2. It says all scale diagrams are moveable, does this mean that pattern 1 for example when moved to fret 6 will give the A# minor pentatonic?
3. What is the benefit of using one pattern over the other?

Reference diagram used to make the boxes in the first diagram: