What type of seeds do gymnosperms possess?

Gymnosperms are characterized by having exposed or "naked" seeds, which distinguishes them from angiosperms, or flowering plants, that have enclosed seeds. In gymnosperms, the seeds develop on the surfaces of reproductive structures, such as the scales of cones. This unique feature allows for the direct exposure of the seeds to the environment, facilitating processes like wind dispersal. While the other answer choices refer to various types of seeds, they do not accurately describe the defining characteristic of gymnosperms. Enclosed seeds pertain to angiosperms, ill-developed seeds are not a recognized classification, and seeds without a protective coat do not reflect the typical structure of gymnosperm seeds, which can have varying degrees of protective layers.