Answer: (D) Operational definition
Explanation:
The operational definition is one of the type of fundamental method that is specifically used to determine the various types of properties by collecting the specific information or data that helps in making various types of decisions.
According to the given question, the description about the specific behavior is basically counted on the basis of the operational definition as it helps in measuring the various types of theoretical based constructs.
Therefore, Option (D) is correct answer.