Here's why:

* Taxonomy is the branch of biology that deals with the classification, naming, and identification of organisms. It involves organizing organisms into hierarchical groups based on their shared characteristics.

Let's look at why the other options are not the correct answer:

* Phylogeny is the study of evolutionary relationships between organisms. It focuses on understanding how different species are related to each other through their evolutionary history.

* Systematics is a broader field that encompasses taxonomy and phylogeny. It aims to understand the diversity of life and its evolutionary relationships.

* Classification is the process of organizing organisms into groups based on their shared characteristics. It's a part of taxonomy, but not the complete definition.

Therefore, taxonomy is the term that specifically refers to the naming of organisms.