Why were cenotes important to the Maya? They were valuable trade items.
They were fertile areas for farming.
They were used to perform sacrifices.
They were the main source of drinking water.

They were the main source of drinking water

Explanation:

D They were the main source of drinking water.

Explanation:

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the answer is

a) revise existing treaties

b) do away with political alliances

c) prevent the spread of communism

d) bring an end to european colonization

the main goal of the southeast asia treaty organization was to prevent the spread of communism in southeast asia.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.