Respuesta :
Answer:
The correct option is "A. pH"
Explanation:
What is fitness hot tubs and whirlpools?
"Fitness hot tubs and, a whirlpool has jets of pressurized water in a tub filled with hot water, and can be used to relax and restore sore muscles after your workout."
What is pH?
"pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water."
To learn more about pH here
https://brainly.com/question/27658054
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