What magnitude earthquake releases approximately 67 trillion joules of energy? a. a magnitude 6 earthquake b. a magnitude 7 earthquake c. a magnitude 8 earthquake d. a magnitude 9 earthquake

C. A magnitude 8 earthquake is the answer.

I would say a magnitude 6 earthquake.

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.

b is the correct answer