how do i write an argumentative essay?

how do i write an argumentative essay?
ok i need a write an argumentative essay but i dnt know how to start i want to write it on anti-abortion or pro gay marriage also i dnt rly know what an argumentative is suppose to go

An argumentative essay is one in which you try to convince someone of something. If you are supporting gay marriage or presenting anti-abortion views in your essay, you would use facts that support your point of view in your essay.

Let’s say that your topic is that food and beverages should be stored in a refrigerator. You could use facts like temperature at which bacteria grows, scientific facts regarding freshness at certain temperatures, taste differences at different temperatures, cooling effects of ingesting cold water vs room temperature water. You would use these to try to convince the reader that your view is correct or more valid than other points of view.