Here's why:

* Angiosperms are flowering plants. They produce flowers which contain the ovary, the structure that encloses the seeds.

* The ovary develops into a fruit, which is the mature, closed vessel that contains the seeds.

Examples of angiosperms include:

* Trees like oak, maple, and apple trees

* Flowers like roses, lilies, and sunflowers

* Vegetables like tomatoes, peppers, and cucumbers

* Grains like rice, wheat, and corn

Let me know if you have any other questions about plants!