“go gator web hosting -domain name and website hosting”

One thing I am confused on is what server is actually running the wordpress software? Does the hosting service (BlueHost, WPEngine, DreamHost, etc) runf WordPress or does the web sever (apache,ngix) run wordpress? What exactly is the hosting service outputting? Is is just giving the webserver the index.php/single.php/etc. or does BlueHost/Dreamhost/etc. output the html? For …