Flour is the primary ingredient of any bread recipe. It is the bread that we see. Flour contains gluten, a protein that provides for the elasticity, and the basic structure of bread. As the mixture is heated, the starch in bread sets, and adds to the structure.
If you are a U.S. permanent or conditional resident -- that is, someone with a green card -- the basic rule is that you cannot apply for U.S. citizenship (or apply to naturalize) until you have lived in the United States as a lawful permanent resident for at least five years.
And there's another benefit to being married to a U.S. citizen: Three years from the date you become a permanent resident, you can apply for U.S. citizenship, so long as you remain married to, and living with the citizen. Most green card holders have to wait five years before applying for citizenship.