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.
The United States Citizenship and Immigration Service (USCIS) lists its processing time for the I-526 application for a conditional green card as 4-6 months. You should be filing your I-829 application to remove conditions 2-3 years after you receive your conditional green card.