The skin. Hallucinating rigidus is a somewhat rare condition where the shin hardens over time. Remember The story of killer croc? He had hallucinations rigidus, and this the name implies. It gives the body a scale like look and texture
A person that studies rocks minerals and earth's land forms are geologist
Answer: the first one
Explanation: the rest are very wasteful :)
I think it would be A. Because DNA always has your genes
