Answer:
<u><em>A waterfall is an erosional landform, which occurs where there is a layer of hard rock on top of a layer of softer rock. Erosional processes such as hydraulic action and abrasion occur as the river flows downstream, however differential erosion takes place as the softer rock erodes faster.</em></u>
Explanation:
Answer:
The answer is a) oil
Explanation:
Oil, especially in these areas, are abundant. In the past, these areas became wealthy because of oil.
It would be a problem because it would cause the land in Mexico City to sink.
Answer:
its the world's longest unfortified border :))