Some animals have evolved a body form that allows them to run very fast,while others run more slowly.Whereas a cheetah can run at speeds over 50 mph,an elephant can barely run at 15 mph.The most important physical factor behind this variance is the difference in
A) the shape of their feet.
B) the length of their legs.
C) the ratio of muscle to their total body mass.
D) the ratio of body length to body height.
Correct Answer:
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