You are presented with the question "What do trees have that insulates?" and the following answer choices: 
- hats
 - looseness
 - dogs
 - woody stems
 - food and shelter
 - cells
 - storing water
 - In their leaves

Now knowing that trees have woody stems covered with bark and bark on mature trees runs 6 to 12 inches thick, insulating the tree against fire damage, choose the best answer.


 

    woody stems     