I believe answer is: Praise
Preys mean something or someone that being hunted by others, praize does not have specific meaning, while prays refers to the act of communicating with a certain type of diety.
Praise means the act of expressing admiration toward a certain things, which is the most suitable for the sentence above.
The answer is B. - Ivan Pavlov
Secondary economic activities produce finished goods which are further used for reconstructing or manufacturing other goods.Such as -
1)Production of steel.
2)Oil refining
3)Chemical Industry
4)Textile Production
5)Food production.
It would be under the policy of Containment otherwise know as the Eisenhower Doctrine.