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.

[Q]: Question: Terry's system wastes 50% of its energy, while Rick's system wastes 75%. The more efficient system is 
 Answer: Terry's
[A]: The greater the wasted output energy, the less efficient the system.


[Q]: Question: Eric hears a sound from far away. If this is the first sound he heard, this sound is likely 
 Answer: strong
[A]: The farther the sound waves travel away from the source, the more spread out their energy becomes.


[Q]: Question: If Milo is out exploring and he comes across two glaciers, each with their own u-shaped valley, will the smaller or larger glacier have a larger u-shaped valley? 
 Answer: larger glacier
[A]:
Smaller tributary glaciers, like tributary streams, flow into the main glacier in their own shallower U-shaped valleys.