Answer:
Olmec civilization
Explanation: hope this helps
If there is a waterfall or rapids than you couldn't go swimming in the river
<span>The populations are already sparse (due to being mainly desert) added to the fact that there is a huge influx of people seeking work oppotunities in the oil industry, from Westerners to Asian communities. This swamps the local population. </span>
<span>Caucasus Mountains separates Georgia from </span>Russia<span />
