To study depression, Avshalom Caspi and colleagues followed a group of nearly 1,000 people from age 3 until age 26. The investigators measured life events experienced by the participants at different ages. What were the findings

answer; collective security;

answer; i believe its (transgender);

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.