Here's why:
* Flowering plants reproduce sexually through seeds. They produce flowers which contain the reproductive organs (ovules and pollen).
* Spore reproduction is characteristic of non-flowering plants like ferns, mosses, and fungi. Spores are single-celled reproductive structures that can develop into a new organism without fertilization.
In summary:
* Flowering plants: Seeds, sexual reproduction
* Non-flowering plants: Spores, asexual reproduction (mostly)
Let me know if you have any other questions!