The primary ingredient in bread is flour. Typically, wheat flour is used, which contains gluten, a protein that gives bread its structure and allows it to rise when yeast is added. Different types of flour can be used, such as whole wheat, rye, or all-purpose, depending on the desired flavor and texture. Other essential ingredients may include water, yeast, salt, and sometimes sugar or fat, but flour remains the foundation of the bread-making process. The combination of these ingredients, along with proper kneading and baking techniques, creates the final product that is enjoyed worldwide in various forms.