Which theory maintains that emotion is caused by the interaction of physiological changes and the cognitive labeling of the reason for the physical reaction?

The answer is the two-factor theory by Frederick Herzberg. In this theory, it states that job factors can create satisfaction and dissatisfaction. This theory is applicable to certain situations only. He assumed that there is a co-relation between satisfaction and productivity, but stresses more on satisfaction than of productivity

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

explanation:

productive can also mean:

producing or giving rise torelating to or engaged in the production of goods, crops, or other commodities.

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