Answer:
- Hierarchy or hierarchical system
Step-by-step explanation:
Ranking a system of organisms (plants or animals) or things (non living entities) one above another is using a a hierarchical classification.
Classifying organisms in species, genus, family, order, class, phylum, kingdom and domain (the taxonomic rank) is following a hierarchy.
The hierarchy consists in that the species in the highest rank encompasses the species in the immediate lower rank.
Thus, the system takes the shape of a pyramid. An inverted pyramid in the case of the taxonomic rank: the domain is the biggest level and is on the top, the species is the lowest level and is at the bottom.