What type of respiration is useful in increasing the amount of gas in a food product?

Fermentation is a type of respiration that is useful for increasing the amount of gas in a food product. During fermentation, microorganisms like yeast or bacteria convert sugars into alcohol or acids, producing carbon dioxide as a byproduct. This gas can create bubbles and contribute to the texture and leavening of products such as bread, beer, and yogurt. The process not only enhances the flavor but also improves preservation and nutritional value.