After the exposure of dyed foods, many people said that they could not understand: Food coloring is only to change the color, and only has a "pleasing effect". Why must we dye it? This is not the case. The color of food will change people's taste experience of food, and then affect the choice of food. There is an area in modern food technology that specifically studies how various properties of food affect people's perception of food. Ingredients and Foods processed in exactly the same way, just the different colors used, will cause people to evaluate them significantly differently, and will also affect people's choice of food. The most suitable for this text title is:. ["Food additives you don't know.", 'The psychology behind food coloring.', 'What factors affect food taste.', 'Dyeing technology in modern food production.']