The correct answer are I, II, and III.
The following options would be useful in creating a phylogenetic tree of a taxon:
I) morphological data from fossil species.
II) genetic sequences from living species.
III) behavioral data from living species.
When we are talking in scientific terms, a phylogenetic tree of a taxon os an evilutionary tree that describes the evolutionary process of a group or organism that scientists call "taxon." At the top of the branches of a tree, you put the species, and then, their descendants. The nodes in the branch serve to identify common ancestors. If there is a split in the same node, it is because they are related and the scientific name is "sister groups."