Question

the function of leavening agents is to...
add structure
binding and color change
make chemical or physical change - ex. air bubbles
make it taste sweeter

Explanation:

Leavening agents work by creating gas (either through chemical reactions like baking soda reacting with acid or physical means like whipped egg whites trapping air). This gas forms bubbles that cause dough or batter to rise. For example, in bread making, yeast (a leavening agent) ferments sugars and produces carbon - dioxide gas which forms air - like bubbles.

Answer:

Make chemical or physical change - Ex. air bubbles