A phylogenetic tree a. indicates common ancestors for each family. b. uses only derived characters. c. includes the organism's order and class. d. indicates common ancestors. e. indicates the organism's taxon.

Option D.

Explanation:

A phylogenetic tree is a brach diagram that shows the relationship among species of organisms in a taxa base on their differences and similarities of physical characteristics and genetic characters indicating common ancestors.

The tips of the tree represent descendents of the taxa and the node represent the common ancestors of the descendants. It uses branches to represent relationships among species, common ancestors and also descendants of the ancestors.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."