Answer:
Barrel Vault
Explanation:
The other vaults look different and a barrel vault is the closest one that matches.
Take EDM for example; it's a combination of words and sounds all cramed together to create a piece of music, most of the time it has no official reason or back story but is simply made to be enjoyed. This concept is the same with Jazz music. When jazz was invented there was no definitive reason or way to play it, you just grabbed an instrument and started playing whatever cords and rhythms you thought sounded nice.
Explanation:
Dialogue
stage directions (as you should know where things are probably going to be)
technical instructions( because you wouldn't want your actor or actress to get injured at the last minute and check if things are secure properly them you're good to go)
and also setting to see if nobody falls and if you don't want a setting let the actors and actresses know so they can imagine if things are there by themselves.
BTW I do drama so I kinda know and you wouldn't want any of your cast to be injured unlike mine before the play.
Answer:
The focal length or depth of field
Explanation: