the correct answer is a breeze
The valley of Mexico is a highlands plateau in central Mexico roughly coterminous with the Present-day Mexico city and the Eastern half of the State of Mexico
<span>True, however 50% is rather optimistic value, it's probobally more. The main source of water is in the ground and the groundwater gets constantly more contaminated with road salt, oil, gasoline and other chemicals (and as you can see, these are all manmade products).</span>
The correct answer is - ocean beaches.
Central Asia is a landlocked region, and the only water bodies that it has contact with are few large lakes, like the Caspian one. The region has no sea or ocean nearby, thus ocean beaches are not something that can be found.
Central Asia in general is a region that is arid and semi-arid, while the terrain varies between vast lowlands and very high mountains. The lowlands are mostly covered with grasslands or with deserts. The high mountains on the other hand, give a big contrast, as they are actually having numerous glaciers on them, despite being surrounded by deserts and steppes.
