When making bread why is the dough left in a warm place for a while before putting it in the oven

so that bread will rise when heating

Explanation:

the yeast will activate and be ready to produce gases when baking

b) the inside picture would look at a very high temperature in a very low ph

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.