Which is an innovation of gymnosperms? Gymnosperms are the first seed plants.
Gymnosperms are the first flowering plants.
Gymnosperms are the first vascular plants.
Gymnosperms are the first spore-bearing plants.

note:

Gymnosperms possess several key evolutionary innovations compared to earlier groups such as the clubmosses and ferns. They produce sperm-containing pollen, which is carried through the air by the wind to the female. This innovation has freed these plants from the need for water for sexual reproduction.

the correct answer is - ability to find a mate