A. Sound is a form of mechanical energy
Answer:
They adapted with new traits to survive to new environments.
Explanation:
survival of the fittest
Answer:
oxygen, sulfur, selenium, tellurium, polonium, and ununhexium (O, S, Se, Te, Po, and Uuh, respectively)
Explanation:
i hope it helps all this are 6 valence from electron and form 2-iron.
