Answer
C - the branching pattern of evolutionary relationships.
Work Step by Step
Definition of phylogeny. Phylogenies are based on the similarities of traits among species. They can be described using the phylogenetic tree, which uses the similarities of traits to indicate how closely related different groups of organisms are.
It is not the genetic biodiversity of a species (E), the process of evolution that creates new species (D), the study of morphological traits (B), or the number of evolutionarily related species in an ecosystem (A).
