These three gums are extracted from different substances. Pectin is extracted from the fruit of plants, while gelatin is extracted from fish skin, animal skin and bones. Carrageenan, on the other hand, is extracted from unicorn cabbage, deer horn cabbage, stone flower cabbage, etc., which is more similar to pectin. All three are different materials for making fondant, pectin is a plant gum is healthier, gelatin is animal gum, some halal countries do not use gelatin. Translated with www.DeepL.com/Translator (free version)