What Is the climate in western Siberian plain??

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Explanation:

In January, average temperatures range from −15 °C (5 °F) in the southwest to −30 °C (−22 °F) in the northwest. In the summer, the range is from 20 °C (68 °F) in the south to 10 °C (50 °F) in the north. Because the terrain is flat, cold air masses from the Arctic can penetrate deeply.

hope this helps,

pls mark brailiest

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.

true