Sampling Design Video

After viewing these videos,  please explain which sampling method best describes what you will use for the group survey that you will write and deploy...

https://www.youtube.com/watch?v=ExVZ1QMWCJY

https://www.youtube.com/watch?v=n3fSyjUQGOg

https://www.youtube.com/watch?v=4VO_xHHD180