How do the Earth's inner and outer core compare? A- The outer core is solid, and the inner core is liquid
B- Both the outer core and inner core are solid
C- Both the inner core and outer core are liquid
D- The inner core is solid, and the outer core is liquid

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."