The largest gap between young people and all other groups occurs in the category "Deleting/editing something you posted in the past." Why do you think this is the case?

This is true because the young generation believes in evolution and is concerned about hiding the past, whereas the other groups are considerate about their past and glorify it in every possible way.

Explanation:

Due to invention of social media, the life of the youth is now superficial where the things of the past are a clear depiction for the world to see and observe. As the youth can't amend it accordingly, thus they want to delete something they have posted in the past.