When commenting on or responding to a post click the “Reply” link that’s associated with that post – there’s one with every post. It will keep your comment/response connected to what you’re replying to. And will help everyone know what you’re talking about.
If you want to reference a post, just right click and copy the “Permalink” that every post has. This is very handy when someone asks a question and you find a very old post that answered it. You can simply paste the “permalink” in your comment. Pete