Question

why is yeast used for the manufacture of breads, pastries and cakes​

Answer 1

Answer:

yeast has acid that convert many things to usuful thinhs

Answer 2

Answer:

Explanation:

Yeast is the driving force behind fermentation, the magical process that allows a dense mass of dough to become a well-risen loaf of bread. And yet yeast is nothing more than a single-celled fungus. ... Yeast works by consuming sugar and excreting carbon dioxide and alcohol as byproducts.