Please Help Asap!!!!!!!, Look At The Image Below., Around Which Line Depicted In The Image Does The Earth Rotate: The Dashed Black Line, The Bold Blac

PLEASE HELP ASAP!!!!!!!

Look at the image below.



Around which line depicted in the image does the Earth rotate: The dashed black line, the bold black line, the dark green line, or the light green line? Why?

  Probably its axis, if its rotation we're talking about, then it should only be on its own axis (the black slanted line). It cant be the orbit since itd be the earth's revolution then. Earth's rotation is only on its axis. Earth's revolution is on its orbit around the sun.