I’m very confused ! (pic attached)

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this