What made Athens difficult to attack directly? Athens was located far away from other city-states.
The harbor of Athens was protected by tall mountains.
Athens was secured by walls and the city center was on top of a hill.
Athens was on an island and was protected by water on all sides.

answer; i thinking 4.5 million. in sydney australia;

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.

the florida everglades

explanation: