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.

Example Input: Question: If Mona is creating a reaction using solid reactants and she decreases the surface area of those reactants, what happens to the reaction rate? 
 Answer: decreases
Example Output: Therefore, increasing the surface area of solid reactants increases the reaction rate.

Example Input: Question: Rocks that are buried very shallow are _____ than rocks on the surface. 
 Answer: newer
Example Output: The main law is the law of superposition. This law states that deeper rock layers are older than layers closer to the surface.

Example Input: Question: If a device were to become less efficient, it would produce _____ usable energy. 
 Answer: less
Example Output:
The more efficient a device is, the greater the percentage of usable energy it produces.