Which is the most common method of tree harvesting for an even aged forest stand?
a. clear-cutting
b. selective cutting of groups of trees
c. shelterwood cutting
d. selective cutting of single trees

Selective cutting of groups of trees   is the most common method of tree harvesting for an even aged forest stand

Explanation:

Selection cutting is the other name given for the selective cutting method.It is also called as "selection silviculture". It is a method of cutting down the trees that are grown in the way of forest and ends up in cutting those trees that are aged and uneven or all old aged trees.

It is the process of cutting down a set of trees which can be either 3 or 5 or 10 together that are of olden age. The age of the trees can be learnt with the help of stocking models that are obtained form the old growth trees study. Using stocking models derived from the study of old growth forests. The implementation of this process is difficult but it has various economic benefits associated with it.

amber has allowed scientists to study dna that has been preserved over millions of years.