What attributes does lactic acid confer to yogurt? 2. how does the consistency of the milk change during the production of yogurt? what facilitates this change?

Lactic acid allows milk to curdle and solidify and give it a more solid texture as well as a slightly bitter taste, compared to milk yoghurt is in a more solid phase and has a higher consistency. this process is facilitated by the lactobacilli which increases lactic acid production.