To support the relationships shown on a graph of different types of vertebrates, the most appropriate evidence would be:
Amphibians and mammals have similar traits that are not seen in reptiles and birds.
This response suggests a closer evolutionary relationship between amphibians and mammals, which aligns with many classification schemes in vertebrate phylogeny. The similarities in traits can imply common ancestry, which would support a graph depicting these organisms as related. The other options either incorrectly describe genetic relationships or emphasize dissimilarities that do not support the connections typically depicted in vertebrate classification.