What permissions should you assign a group if you want the group to have the ability to read, add, delete, execute, and modify files, but not to be able to delete subfolders and their file contents, change permissions, or take ownership?

Modify is the correct answer to the following question.

Explanation:

If any person or user wants to read, delete, modify and execute the files then they have required the Modify permission. In other words, Modify permission provides the user to modify and delete the following files but they unable to delete subfolders because of the following permission.  

If they want then they have to change the permission by click right button from the mouse on the file or the folders which they want to change and then click on the properties from there they can change the permission.

answer; numerous occupation(s);

answer ingress;