Answer:
electromagnetic waves 
Explanation:
"wave" is a common term for a number different ways in which energy is transferred 
 
        
             
        
        
        
Ionic bonds are formed between a cation (metal) and an anion (nonmetal)
        
             
        
        
        
D. 
Have a longer revolution time since they definitely do not get warmer, They do not have fewer moons (Jupiter has about 100 and earth has 1) they are not smaller in diameter (Earth v Jupiter)