Question

why was sugar added to the dough​

Answer 1

Answer:

The dough rose because of the release of carbon dioxide which is a product of anaerobic respiration. b) The dough becomes sour because of the production of alcohol produced during the anaerobic respiration by Yeast. c) A pinch of sugar is added to the dough for yeast to feed upon it and multiply.

Answer 2

$\large\bold{\underline{Answer :-}}$A pinch of sugar is added to the dough for yeast to feed upon it and multiply.