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: Rick had a rock (Rock A) from 1000 feet beneath the crust's surface. He later dug 3000 feet deeper and got a second rock (Rock B). Which rock is likely older? 
 Answer: Rock B
[A]: Older rocks are at the bottom and younger rocks are at the top.


[Q]: Question: A wave with a high frequency has _____ energy than a wave with a low frequency. 
 Answer: more
[A]: Higher frequency waves have greater energy.


[Q]: Question: If Milo is growing some plants in his garden and he accidentally coats them with something that decreases their sheen, what happens to their reflectivity? 
 Answer: decreases
[A]:
Increases the sheen on leaves to make them more reflective.