If the number of rings along with scion, nutrition and other factors affect the overall health of a tree, then what can be checked along with nutrition and scion that can help determine health of a tree.?

Answer choices:
- the number of rings
 - Temperature
 - Exfoliation
 - it needs them
 - organic molecules
 - aerobic capacity
 - biodiversity
 - looseness of dirt or compost

 

 the number of rings         