Doubt in course purchased from udemy

Has someone purchased course from udmey of »biggner to evolved »? Right i possess some doubts which when i save an utter to in Q n A chunk they send me an email where there is a red button for study response. which redirect me to the course which i will bewitch , due to this fact i couldn't realize why i will't save an utter to fancy other students where whatever they’ve written in Q n A chunk it has been replied by that particular person « kyle ». And someone can acknowledge to these questions please lend a hand me