it solidfy by the temperature
Skeleton's Gelatin.
skeleton gelatin
To solidify
milk
Yes, the dessert Gelatin is a type of colloid. It is a colloid because it can be easily made by adding powder to water so that it congeals.
The mixture is homogeneous.
The best method for using leaf gelatin in a dessert recipe is to soak the gelatin leaves in cold water until they become soft, then squeeze out excess water before adding them to a warm liquid to dissolve. Stir the mixture until the gelatin is completely dissolved before incorporating it into the dessert recipe.
See: Gelatin Dessert
Pigs trotter is boiled and put into gelatin
To make a delicious dessert using clear gelatin, follow these steps: Dissolve the gelatin in hot water, add your desired flavoring (such as fruit juice or extract), pour the mixture into molds or a dish, and refrigerate until set. You can also add fruits, whipped cream, or other toppings for extra flavor and texture. Enjoy your tasty gelatin dessert!
bananas, canned fruit
Neither - it a colloid of a liquid in a solid.