The correct answer is the statement #3. The statement that says: your hypothesis must be testable, is a true statement about the scientific process. IT will be truly unreasonable and a waste to be doing experiments on a hypothesis that is not even possible to solve.
Hi you didn't provide any images to solve the question, hence I am going to solve a different question of same concept so you can have an idea how to tackle such types of questions.(please refer to the attachment for question)
Answer:
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Explanation:
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<span>Vibration is the Answer</span>
الملك - الإتاوات - المحاكم - المجلس الملكي - القانون الروماني
<span>because electrical charge builds up otherwise know as static electricity</span>