What is yeast used for?

Production of bread and beer .

The correct answer is Option (1) →Production of bread and beer

Explanation:
Yeast, particularly Saccharomyces cerevisiae, is a single-celled fungus widely used in the production of bread and alcoholic beverages like beer. In bread-making, yeast ferments the sugars present in the dough, producing carbon dioxide gas. This gas gets trapped in the dough, causing it to rise and resulting in soft, fluffy bread. In beer production, yeast ferments the sugars in malted grains, converting them into alcohol and carbon dioxide, which contributes to the beer's alcohol content and carbonation.