foods containing yeast such as bread
No, yeast is pretty much present in many foods.
Brewers Yeast
Bread, baked items that rise while being cooked. Beers and yeast extract is added to foods to enrich the flavor
Yeast cannot produce their own foods. The yeast do not have chlorophyll. Yeast must rely on other ways and sources to get food. Yeast mostly feed on sugar.
they can, but they don't all.
What are the list of HS foods ?
Brewers yeast is the leftover product from beer making: so for foods: vegemite and marmite and other yeast extract products are made from brewers yeast.
to obtain energy
you can find a list of french foods at buzzel.com
Bread and beer may be the most common.
Yeast is used in making bread and beer; mold is used in making blue cheese.