The science of the classification of organisms is a taxon a taxonmist a species taxonomy

Option D, taxonomy

Explanation:

The definition of all the terms given as option in this question is-

a) Taxon - This represents a group that signifies a rank in a given taxonomic classification

b) Taxonomist - A person who studies about the classification of organism or any thing is called a taxonomist

c) Species - It is a rank with in taxonomic classification which includes organism sharing some common traits

d) Taxonomy - it is the branch of science that deals with the classification of organisms.

Thus, Option D is correct.

d we did this already