Which raw, enzyme-containing fruit dissolves gelatin?

The fruit that dissolves gelatin due to its enzyme content is pineapple. This is because pineapple contains an enzyme called bromelain, which breaks down proteins. Gelatin is a protein derived from collagen, and when bromelain comes into contact with gelatin, it causes the gelatin to lose its structure and dissolve.

This characteristic makes pineapple unique among the choices provided, as the other fruits listed do not contain enzymes with the same ability to break down gelatin. For example, mango, banana, and kiwi contain other types of enzymes, but they do not have the specific properties that allow them to dissolve gelatin effectively. Kiwi does contain an enzyme called actinidin, which can also affect gelatin, but bromelain in pineapple is particularly well known for this property. Thus, pineapple is the most recognized and effective fruit for this purpose.