Question

which group of animals on this tree are most closely related to birds? crocodiles saurischian dinosaurs ornithischian dinosaurs none of these are related to birds

Explanation:

In evolutionary biology, birds are descendants of theropod dinosaurs which are part of the Saurischian dinosaurs. The phylogenetic tree shows the common - ancestor relationships, and Saurischian dinosaurs share a closer common ancestor with birds compared to the other options.

Answer:

B. Saurischian dinosaurs