How do you make money by Blogging?

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So, I ask you all, how do you make money by blogging? I know all of us are suffering from economic crisis, financial, and a lot more kinds of crisis we are facing today. Some of us thought of an idea that we could make money online. One way is blogging. Can you help me? Because I don't really know how and also want to make income at my early age, at 13. Also, to help my family. Please give suggestions also to my blog: vannice95.blogspot.com. So, please help me. Thanks!