Fact 1: All chemical reactions require activation energy to get started.

Fact 2: Catalysts lower the activation energy for reactions.

Given the two facts above, answer the question "Catalysts lower the input required for chemical reactions to what" with the following options: 
- temperature
 - It decreases
 - adding heat
 - Under 32 degrees
 - Decibels
 - reduce
 - the environment
 - get started


 

        get started 