Which yeast is used for making bread?

Statement $X$: $LAB$ (Lactic Acid Bacteria) is very useful for the digestive system.
Statement $Y$: $LAB$ protects us from harmful bacteria in the stomach.

Which of the following food items are produced through fermentation by the microorganisms?
$(I)$ Idli $(II)$ Dosa
$(III)$ Toddy $(IV)$ Cheese

For the production of which of the following,the activity of the fungus or micro-organisms is not required?

Assertion: Yeasts such as $Saccharomyces \text{ } cerevisiae$ are used in the baking industry.
Reason: Carbon dioxide produced during fermentation causes bread dough to rise by thermal expansion.

Cheese is prepared from