Question

Dendrochronology is the study of
A. Height of a tree
B. Diameter of a tree
C. Age of a tree by counting the number of annual rings in the mainstream
D. None of these

Answer 1

Trees in moderate zones are fair in height, width, and construct one growth-ring each year, with the newest next to the bark. Therefore, for the complete period of a tree's life, a ring outline builds up that reflects the age of the tree and the climatic circumstances in which the tree rises. Sufficient moisture and a long growing season result in a wide ring, while a drought year may affect a very narrow one.

Complete answer:
The most common method to calculate the tree height is to use clinometers that are based on trigonometric relationships from the instrument to the base and the top of the tree.
The two most frequent instruments used to assess girth are diameter tape and calipers.
Dendrochronology (or tree-ring dating) is the systematic method of dating tree rings (also called growth rings) to the precise year they were formed. It is also used as a test in radiocarbon dating to standardize radiocarbon ages. The study of the age of trees by counting the number of yearly rings in the main stem is called dendrochronology.
So, the correct answer is “Option C”.

Note:
Dendrochronology is helpful in determining the precise age of samples, particularly those that are too recent for radiocarbon dating, which always creates a range rather than an exact date. However, for a precise date of the death of the tree, a full sample to the edge is needed, which most trimmed timber will not offer. It also provides data on the timing of events and pace of change in the environment and also in wood found in archaeology or works of art and architecture, such as old panel paintings.