Nature kills the weaker organisms and selects only the strongest organisms, which can survive and flourish. thats the right answer

✿   this landform has a high elevation and a high relief

✿   this landform is a mountain

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