Let's think step by step! The most ancient what are trees with woody trunks?
Options:
- (A) it needs them
- (B) leafy greens
- (C) more abundant
- (D) Leeuwenhoek
- (E) flowering buds
- (F) pollen
- (G) graptolites
- (H) seed plants
The thinking starts now:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Most modern gymnosperms are trees with woody trunks. Gymnosperms are the most ancient seed plants. The most ancient seed plants are trees with woody trunks. The final answer: (H).