It is about 700 km<span> (435 mi)</span>
Answer:
They have helped nearby societies because they provided them with a sufficient and reliable water source. This allows them to get enough drinking water and allow them to easily grow their agriculture.
<span>Mexico has two mountain ranges (Sierra Madra Oriental and Sierra Madre Occidental) that run generally north-south along the majority of the mainland (that is, everything other than the Baja Peninsula). If you look at an east-to-west cross section of Mexico's landforms, you have the coast, then a mountain range, then a BIG valley/basin, then another mountain range, and finally the other coast. </span>
Earth is going around right now so its no flat at all lol