A string is pulled tight. A machine causes it to vibrate at different frequencies. What will happen to the vibrations in the string when they are vibrating at their resonant frequency?

What about it? how is this a question

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.