Fruit types can be categorized into several groups based on their structure and development. The main categories include simple fruits, aggregate fruits, and multiple fruits. Simple fruits develop from a single ovary and can be further divided into fleshy fruits like apples and berries, and dry fruits like nuts and legumes. Aggregate fruits form from multiple ovaries of a single flower, such as raspberries and blackberries. Multiple fruits, on the other hand, develop from the ovaries of several flowers that grow closely together, like pineapples and figs. Each type of fruit plays a unique role in plant reproduction and seed dispersal.