Answer: d) Process
Step-by-step explanation:
Process memory model of Atkinson and Shiffrin describes about the memory getting stored and attained in the storage of long term memory.This process works by passing the information memory to the sensory stage through which it gets transferred to short-term memory for a while.After that it is passed on to long term memory for long time storage in permanent form.
Other options are incorrect because structural model based on structure of the model. Idiographic model is based on scientific facts discovery. Nomothic model describes and identifies the variation in model.Thus, the correct option is option(d).