Why is dough left to rise for 1 hour?

Dough is left to rise for about an hour to allow yeast to ferment, producing carbon dioxide gas that causes the dough to expand and become light and airy. This fermentation also enhances the flavor and texture of the bread. The resting period allows the gluten in the dough to relax, making it easier to shape later. Overall, this rising process is crucial for achieving the desired characteristics of the final baked product.