-Kumudinee, Subject Matter Expert at Edumarz.
Solution: An unit or category of classification is known as a taxon.
It denotes a rank. It is used in classification of living organisms.
Taxonomic classification uses binomial nomenclature to name and classify the organisms.
For example, the basic level of classification is known species, followed by genus, family, order, class, phylum or division, in ascending order.
The highest level of classification is called a kingdom.
So each of these categories can be called a taxon.
Some examples: