Final answer:
The pair that demonstrates a good operational definition for a psychological concept is "Pretend Play: Giving children a choice of toys and child interacting with toys".
Step-by-step explanation:
The pair that demonstrates a good operational definition for a psychological concept is:
B) "Pretend Play: Giving children a choice of toys and child interacting with toys"
An operational definition should define a concept in terms of observable behaviors or conditions. In this case, the operational definition for the concept of "Pretend Play" includes specific actions such as giving children a choice of toys and observing their interaction with those toys. This provides clear and measurable criteria for identifying and studying the concept of Pretend Play.