Which of the following sequences is correct, according to taxonomy?

The correct answer is Phylum-Class-Order-Family-Genus-Species.

Taxonomy is the science of naming, describing, and classifying organisms into hierarchical categories based on shared characteristics. The standard biological classification hierarchy arranged from the broadest (highest taxonomic rank) to the most specific (lowest taxonomic rank) is as follows:

1. Kingdom
2. Phylum
3. Class
4. Order
5. Family
6. Genus
7. Species

Looking at the given options, the correct sequence representing the hierarchy from broader categories to narrower ones is: Phylum → Class → Order → Family → Genus → Species.