You are presented with the question "Secondary growth forms secondary" and the following answer choices: 
- blood vessels
 - permineralization
 - Conifers
 - color of leaves
 - oxidation reaction
 - Most plants
 - peachleaf willow
 - shrub beds

Now knowing that secondary growth forms secondary vascular tissues and bark and vascular tissue refers to blood vessels, choose the best answer.


 

 blood vessels        