B. Chitin- its a hard and tough substance that occurs widely in nature, particularly in the shells (exoskeletons) of arthropods such as crabs.
King Tutankhamun's mummified body was enclosed in three nested coffins with the innermost made of gold.
Tutankhamun’s sarcophagusis composed ofbut three coffins in which to hold the body of the king. The outer two coffins were made of wood and covered in gold together with stones, like turquoise, but the inner coffin was made of solid gold.
Answer:
Cosmology is study of the origin and evolution of the universe. Currently, cosmologists expect the universe to continue expanding indefinitely and probably heating up. The expansion is speeding up. Also, it is expected that entropy will increase leaving no free energy in the Universe.
I believe one way is natural selection. Hope I helped!