The concept of multi-directional development suggest that when change is gradual it is an example of

Continuity

Explanation:

According to my research on studies conducted by various scientific professionals, I can say that based on the information provided within the question this is an example of Continuity. This refers to the uninterrupted but gradual constant change during a long period of time. Just like when a tortoise continues to grow during it's 150 year lifespan.

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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.

liverpool, trent alexander arnold

explanation: