Todoroki here-
Wow, I've heard of it and played it but I never made to that level. I got mad and gave up on that game. Sorry Deku
The last one because it lists both realistic pros and cons to using stock footage :)
The answer would be the third option. "They could be made using formulas, could show ideal beauty, or could be realistic."
Hope this helps! :)
The scenery helps us understand where the story is taking place.
B they tend to promote because training and getting people ready takes a lot and they want to keep them there as long as possible instead of paying to retrain people all the time