Answer: 
Turns into a gas? Not much context to work off of. I don't know what is exactly being asked.
Explanation:
 
        
             
        
        
        
I think your answer might be C
        
             
        
        
        
Answer: The answer is Computer Model
Many researchers have suggested that using computer models would be more advisable to use to predict the earthquake. Researchers believe that it would be easier to tell the reaction of many nuclear power plants. They want to reassess the safety measures that are being implemented by many nuclear power plants.
Explanation: