C ( Porcupines use there’s sharp quills to defend themselves from larger predators!)
        
             
        
        
        
The molecule for ethane is C2H6. or CH3-CH3. 
Carbon LOVES hydrogen. If possible, Carbon would have four bonds attach to hydrogens. IN this molecule, one of the bond is used to attach a carbon to another carbon, so instead of 4 hydrogens, each carbon would have 3 hydrogens..