The correct answer is seedless plants.
The seedless plants refer to the plants that spread and reproduce with the help of spores, however, they do not flower or produce seed.
The lifecycle of a seedless plants substitutes between a haploid gametophytic and a diploid sporophytic phase. These plants reproduce via haploid and unicellular spores rather than seeds. These spores are lightweight, which permit for easy dispersion in the wind. Some of the examples of seedless plants are ferns, horsetails, whisk ferns, clubmosses, and others.