Respuesta :
The similarity of the bone structure suggest about these animals should be that they evolved at the same time
What is bone structure?
Bones are considered to be the living tissue that comprise of the own blood vessels, and should be made of the various cell, proteins, minerals, etc. In this it enables them for growing, transformation, and repair via the life.
Since both arm and legs should have one bone at the top, so here we considered the option c should be right.
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