The camera angles of interview shots

My teammate, Melissa has filmed an interview when she was in China in summer holidays, and here is the collage that I have made by using her interview shots of that interview which that she was testing the camera angles and shots of the interview.

 Also, I have made a presentation to analyse those shots and trying to figure out why Melissa has chosen the middle one in the collage for the final angle and shot of interview. (Since this was done by herself, I didn't involve.)
Here is the link
https://www.emaze.com/@AOFZCOCIW/the-camera-anglesof-interviewshots