Which function of word processing processing program will be the most useful for comparison

In order to compare two documents in word, you should click at the view tab and then at the view side by side option in the top ribbon. When you click at that, a window will appear asking you which document you would like to compare side by side with the one that is already open and it gives you a list of word documents that are also open. Before you choose to compare two documents just make sure that you have opened both of them in word, so that they appear in the options. Once you chose the one you want, it will open in a new word window right next to the first one and you will be able to compare the two documents.  

check your question

- "these rights are natural and god-given to all men equally." (i disagree cuz i kind of think it's 'a' but who knows.)