Respuesta :
Counting the age of a tree is determined by the rings seen in the stem. The answer to your question is A. I hope this is the answer that you are looking for and it comes to your help.
Answer: Rings seen in the stem
Explanation:
The age of the trees can be determined by counting the number of rings in the stem of the tree. There is formation of rings in the stem of the tree every year or every season.
These rings are formed due to cell division within the cambium layer of the woody stem. If the tree is a year old it might have a single ring if it is an annual tree and by counting the number of rings the age of tree is calculated.