Why is the heart anchored to the diaphragm? What is the function of this anchoring?

i don't know. if i were you, i would search it up online : d

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

b is the answer and if you need further with anything message me