You are presented with the question "Catalysts lower the input required for chemical reactions to what" and the following answer choices: 
- temperature
 - It decreases
 - adding heat
 - Under 32 degrees
 - Decibels
 - reduce
 - the environment
 - get started

Now knowing that all chemical reactions require activation energy to get started and catalysts lower the activation energy for reactions, choose the best answer.


 

        get started 