In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: The concentration of the hydrogen ion in a solution can be calculated when what is known? Answer: ph
The concentration of the hydrogen ion in a solution can be calculated when the ph is known.

Question: What measurement of the wave is used to determine the magnitude of an earthquake? Answer: height
The height of the wave is used to determine the magnitude of an earthquake.

Question: Which of the following characteristics will best prevent a tree from being blown over by high winds during a storm? Answer: deep roots

Deep roots will best prevent a tree from being blown over by high winds during a storm.