It's called drumlin
A drumlin.
drumlins
The President's office is called the oval office.
A large mound or raised area of earth is called a hill or mound.
it is a hill
A drumlin is a long, oval mound of glacial till or drift formed by the movement of ice sheets over the landscape. It often has a steep side facing the direction from which the ice came and a gentle slope on the opposite side.
Oval. It is called the Oval Office.
oval lines
It is called an oval - which is not the same as an ellipse.
I would say that's a "mound" of earth.
A 3d oval is called an ovoid. Egg would work as well
A small hill-like mound formed from the deposits as a glacier recedes is called a moraine. Moraines are composed of till, which is a mix of rock, sediment, and debris that the glacier carries and deposits as it moves and melts.