The Greek word 'phusis' for nature is appropriate in describing the field of physics. Which one of the following is the best answer for this? (a) Physics is a natural science that studies life and living organisms on habitable planets like Earth. (b) Physics is a natural science that studies the laws and principles of our universe. (c) Physics is a physical science that studies the composition, structure, and changes of matter in our universe. (d) Physics is a social science that studies the social behavior of living beings on habitable planets like Earth.