You are presented with the question "What forms secondary vascular tissues and bark?" and the following answer choices: 
- bamboo
 - humans
 - trees
 - ferns
 - fish
 - phytoplankton
 - plants
 - oak

Now knowing that secondary growth forms secondary vascular tissues and bark and trees have the ability to undergo secondary growth and produce a woody body, choose the best answer.


 

   trees      