You are presented with the question "All chemical reactions require the initial input of energy to get the reaction what?" and the following answer choices: 
- made
 - state
 - started
 - Decibels
 - over
 - heat
 - finished
 - removed

Now knowing that all chemical reactions require activation energy to get started and activation energy is the initial input of energy required to get the reaction started, choose the best answer.


 

   started      