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 comparing the erosion rates of two rocks and she notices that granite is softer then marble, which rock will water erode slower? 
 Answer: marble
The water erodes the softer rock faster than the harder rock.

Question: Carla is pushing two carts down a street. One cart is heavy, the other is light. The light cart, compared to the heavy one, will accelerate 
 Answer: quickly
The greater the mass of an object, the less it will accelerate when a given force is applied.

Question: Milo uses an engine to produce energy at his job. If his engine starts producing less wasted output energy, what would happen to the efficiency of his system? 
 Answer: more efficient

The greater the wasted output energy, the less efficient the system.