The correct response is:
Around 300 million years ago, the regions where coal formed were located in tropical climates that were partially submerged on the coasts.
This supports the theory of plate tectonics because it indicates that these coal-forming regions were once located in equatorial regions when the continents were together in the configuration of Pangaea, demonstrating the movement of continents over geological time. Coal deposits are typically found in sedimentary basins that were once lush, tropical environments, which would have existed in different locations due to the shifting positions of the continents.