Hi, Chris. Your 'Opt' folder is not something created by the operating system or by other Apple software, to the best of my knowledge. You or some other user of the computer, or some third-party software application, must have created it for purposes best known to them. What if any error message appears when you put it into the Trash and try to empty it? Have you tried putting it into the Trash, restarting the computer, and then emptying it?
In the future, your posts will be much easier for other people to read if you refrain from capitalizing every word.