What is the name of shaded part of the sound longitudinal wave shown?

it's unlikely a majority of a large population would agree on issues

hope this : )

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

the answers are a and c