why does it prevent me from installing flash player in ie 11 and in the other browsers yes, I tried everything. I want to install it in ie11
In Windows 8 or Windows 10, you cannot install it because it is already there as part of Windows.
In addtion to OPs comment, all browser's block/disable Flash Player by default. This is most likely what you're encountering. See https://helpx.adobe.com/flash-player.html for more information on unblocking/allowing Flash in the various supported browsers.
Hello. I have deleted it and reinstalled it, but it does not appear in internet options-manage add-ons, so I want to install it again and I do not get the option.
So... which Windows version do you have?
Internet Explorer in Windows 10? It is impossible to install it, and if you uninstall it you have to use a special Windows tool that removes it forever (no undo is possible). So what do you mean by "deleted and reinstalled it"? Are you maybe not using Internet Explorer?