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 Mary is performing an experiment and she increases the frequency of her electromagnetic wave, what happens to the energy it produces? 
 Answer: increases
The higher the frequency of an electromagnetic wave, the greater its energy.

Question: When Katie was in the hospital with high blood pressure, she understood that the volume of her blood was 
 Answer: high
As blood volume in the body increases, blood pressure increases.

Question: If Mary is performing an experiment and she decreases the frequency of her electromagnetic wave, what happens to the energy it produces? 
 Answer: decreases

The higher the frequency of an electromagnetic wave, the greater its energy.