Question

Which describes the modern classification system?

Answer 1

The question must refer to the modern classification system in biology.

It started with the work of Linnaeus - so its early version can be called a Linnaean classification - but right now it has been expanded and changed to fit the evolutionary relationships between the species - which is the best description, i.e. the answer is "it is based on the evolutionary relationship of the species"

Answer 2

The modern classification system is mainly based on common ancestry. Therefore it is based on evolutionary relationships. A common ancestor refers to the most recent ancestral species from which other different species evolved.

Answer: Based on evolutionary relationships.

I hope it helps, Regards.