The internal structure of the earth consists of three main layers. starting from the center of the earth and moving outward, they are the core, mantle, and crust the core, magma, and crust the crust, mantle, and core the mantle, core, and crust

i think the answer is a, hope this : )

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.