-Jam: Jam is made from crushed or chopped fruit cooked with sugar. It has a thick but not firm texture and often contains seeds and pieces of fruit. Homemade fruit jam like pineapple jam maintains some of the fruit's natural texture. -Jelly: Jelly is made from fruit juice, sugar, and sometimes added pectin. It has a clear and firm texture without any seeds or fruit pieces. Jelly has a more uniform consistency compared to jam. -Preserves: Preserves contain whole fruit or large pieces of fruit suspended in a syrupy base. The fruit in preserves is often cooked only enough to soften it and allow it to absorb sugar, retaining a more natural fruit flavor.