Answer the following question: Answer the following question given this paragraph: Such knowledge of the natural world is only part of what science is. Science is as much about doing as knowing. Science is a way of learning about the natural world that depends on evidence, reasoning, and repeated testing. Scientists explain the world based on their observations. If they develop new ideas about the way the world works, they set up ways to test these new ideas. Scientific knowledge keeps changing because scientists are always "doing science. ". Q: Scientists explain the world based on what? Choices: - changes - patterns - theories - observations A:
Answer:
observations