What evidence is used to create the phylogenetic tree for animals?

Phylogenetic trees for animals are primarily constructed using genetic, morphological, and behavioral evidence. Genetic data, particularly DNA sequences, allow researchers to assess evolutionary relationships at a molecular level. Morphological traits, such as skeletal structures and organ systems, provide insights into physical similarities and differences among species. Additionally, behavioral traits can also inform evolutionary connections, helping to depict the lineage and divergence of various animal groups.