Hello mate good day and welcome to the forum [sorry to say this] but about your question about earning merits then all I can say is that stop asking about that, just do some research or study because all you need to know is already given.  and also you already have 1 merit beacuse  Uzairjutt275 already gave it to you and I don't know why because this kind of reply you made are not interesting and not worthy to be given.
You came here not to learn so for me you are not worthy to be given because you will be a spammer if you already join any bounties.