Yeast raises bread dough and makes it fluffy by releasing ____________ gas.

carbon dioxide

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nitrogen

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hydrogen

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oxygen

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Solution

The correct option is A carbon dioxide
Yeast is a fungus used for making bread. When yeast is added with the dough, it grows actively and releases carbon dioxide gas. This carbon dioxide helps in rising of the dough. When this dough is subjected to high baking temperatures, carbon dioxide escapes from the dough resulting in soft and fluffy bread.

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