Answer:
Montezuma treated the strangers on the coast like gods and accordingly gave them vast expensive gifts, due to their pale skin and the way that they had landed on the coast.
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Answer:
An oasis can be formed by an underground aquifer or river that creates enough pressure for water to seep to the surface, forming the oasis. These aquifers and natural springs allow for life to exist in harsh climates like the desert and are often well known to local herders, farmers, and travelers in the region.
It's approximately 450-1450 AD