Answer:
Scientists mostly gain new knowledge through direct observation and applying the scientific method. They would start with a hypothesis and test it, then change it or confirm it. Others would test their confirmation from one point, while the third group would test what the second said. And so on and so forth.
Explanation:
The correct answer to your question is Guanine, so D on plato.
The answer is C. Adapting to changes in the environment
They are related because the high pitch sounds correspond to the sound waves which give high and low frequencies.
