The best high level scientific question among the options is; "Does the amount of salt in water affect the temperature at which it boils?"
A scientific question must be empirical. This means that it must be testable. Testable means that it can be verified by experiments under carefully controlled conditions.
Looking at our options, the only question that can be answered by carefully controlled experiment is; "Does the amount of salt in water affect the temperature at which it boils?".
Learn more: https://brainly.com/question/20955213
