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: If no one used single use plastic the waste would 
 Answer: decrease

A: Using less nonrenewable resources means that they will last longer.
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Q: Question: Ray was traveling in rocket leaving orbit. He keeps the empty fuel containers on board so the ship can fly 
 Answer: lower

A: By using multiple stages, empty fuel containers could drop away. This reduced the mass of the rocket so that it could fly higher.
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Q: Question: Willard dug up a rock from near the surface, and realized it was _____. 
 Answer: young

A:
Therefore, deeper rock layers must be older than layers closer to the surface.
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