Trees of the largest species, coast Banksia and river Banksia often grow over 15 metres tall and species that grow as shrubs are usually erect.
This justifies what answer for what question? Q & A:

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.
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Is the following a factual statement?
"Banksia grows as either trees or woody shrubs."
Options:
- yes
- no
yes