ANSWER:
The marks that are on the top and bottom of the earth are poles, i.e. North Pole and South Pole.
Step-by-step explanation:
- North Pole and South Pole are the top and bottom of the earth. The prime meridian is the 0 degree longitude whereas equator is 0 degree latitude.
- North pole is in the middle part of arctic ocean and south pole lies on the Antarctica.
- Beneath North Pole there is no land available but stacks of ice might be flowing.