Any of a subphylum (Vertebrata) of chordates consisting of animals (such as mammals, birds, reptiles, amphibians, and fishes) with a bony or cartilaginous spinal column that replaces the notochord.
The vertebrates are frogs and fish.
Thus, we can conclude that Options B and D are correct.
You can learn more about vertebrates here:
#SPJ2
A.carbon dioxide
B.oxygen( ? I think this is it?)
C.hydrogen
D.nitrogen
Answer:
A carbon dioxide because the plants need carbon dioxide
It could also be called survival of the fittest
surrvival of the fittest
water that travels across land may pick up substance and become contaminates.