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:
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).