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The study of the structure and behavior of the physical world is known as:

  1. Geology

  2. Physics

  3. Biology

  4. Chemistry

The correct answer is: Physics

Physics is the study of the structure and behavior of the physical world. Geology primarily focuses on the composition, structure, and history of the Earth and its natural resources. Biology is the study of living organisms and their interactions with their environment. Chemistry focuses on the composition, properties, and reactions of substances. Therefore, options A, C, and D are incorrect because they do not pertain to the study of the physical world.