2. A group of lands and people under one government describes
O a. An economy
O b. An empire
O c. A religion
O d. An industry

A group of lands and people under one government is an empire.

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.