Yeast is important in bread making as yeast is the reactant with heat in the oven that makes it rise. It also releases Carbon Dioxide (CO2) which gives you the tiny holes in the bread. The yeast...
is makes it brown nothing except turns it bubbly and kinda purple it gives you severely bad craps!! Because of the acid involved. The sugar (maltose and dextrin to be exact) in the bread makes it...
Salt is very important in bread. It affects not only the flavour but also the rising action of the yeast, the texture of the load and the crust. Without salt the flavour of the loaf can be bland.