Fact 1: Melting is when solids are heated above their melting point.

Fact 2: Softer melt point wax is used to produce an even burning candle.

Given the two facts above, answer the question "What allows candles to burn and wax to melt?" with the following options: 
- nektar
 - lids
 - energy
 - sugar
 - heat
 - displays
 - jars
 - power


 

     heat    