Here's why:

* Deciduous trees are trees that lose their leaves seasonally.

* Fruits are the mature ovaries of flowering plants, containing seeds.

* Deciduous trees, like most flowering plants, produce flowers that eventually develop into fruits.

The type of fruit varies greatly depending on the tree species. Some examples include:

* Apples (apple trees)

* Acorns (oak trees)

* Maple seeds (maple trees)

* Walnuts (walnut trees)

* Peaches (peach trees)

So, while the seeds themselves are formed inside the ovary, they are ultimately enclosed and dispersed within the fruit.