Phylogenetic system of classification includes Evolutionary trends only, Genetic trends only, Evolutionary trend as well as morphology, Behavioural trends in environment

Phylogenetic system of classification is based on the evolutionary descent of a group of organisms, the relationship is depicted either through a phylogram, phylogenetic tree or a cladogram. Classification is constructed keeping this in mind that all the descendants of a common ancestor should be placed in the same group. So, the correct answer is option A.