You are presented with the question "Estimating the age of trees can be used for what" and the following answer choices: 
- genetic diversity
 - they body they live in
 - earthquake history
 - food and shelter
 - gardening
 - important habitats
 - bird watching
 - recreation

Now knowing that the number of rings in a tree trunk can be used to estimate the age of the tree and tree-ring dating the 1700 Cascadia earthquake, choose the best answer.


 

   earthquake history      