At dinner you get your father's advice on whether you should take sociology or political science to meet a requirement. the next day when you see your father, you say, "i decided on poly sci." his understanding of your message is explained by

When something must be comprehended or examined "historical context," it implies the verifiable conditions in which it was delivered especially influenced the work or in this case the decision - its subjects, its procedures, its message, and so on. Without a comprehension of the time, a full comprehension of the piece will be unimaginable.

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.