You will be given a definition of a task first, then some input of the task.
In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

Question: If Mona is creating a chemical reaction in her lab and she decreases the concentration of reactants, what will happen to the reaction rate? 
 Answer: decrease
Output:
When the concentration of reactants is higher, the reaction rate is faster.