You are presented with the question "What describes something that requires activation energy to get started?" and the following answer choices: 
- igniting fuel and oxidiser
 - heating liquids
 - Fully cooking the oysters
 - Riding a bike
 - an engine
 - burning coal
 - chemical equations
 - Firecrackers

Now knowing that all chemical reactions require activation energy to get started and chemical equations describe chemical reactions, choose the best answer.


 

       chemical equations  