Yeast is usually needed to make dough rise. The yeast prefer warmer temperatures as they break down the sugars in the yeast to make carbon dioxide- which make it rise. Follow the instructions on the yeast's packet in order to find out the desired "magic" water temperature.
Yeast dough will rise more slowly if kept at a lower temperature. Chilling the dough in a refrigerator will cause slow, overnight rising. One can also use less yeast in proportion to the flour in the recipe.
Without yeast, dough would not rise or bake properly.
The yeast consumes the natural sugars in the dough and causes bubbles to form. This causes the dough to rise. It's being blown up by the yeast.
No, bread would not be bread or bread dough without flour, and it definitely would not rise.
To allow the dough to rise so you get a lighter, less dense end product.
Yeast makes the pizza crust rise. A pizza crust is made from a form of bread dough.
Carbon dioxide
The yeast cells in bread dough ferment sugars and produce gas (carbon dioxide). This makes the dough rise.
i would say room temp.
It has to be room temperature for the dough to rise.
Flour is flamable. However wet dough is unlikely to catch fire because the water in it would have to evaporate before the temperature of the dough could rise to a point where the solids can burn.
Pentosans are large sugar molecules that slow the rise and fall of dough