Final answer:
A case study is an in-depth analysis of a single event, situation, or individual. It involves collecting a great deal of information from one individual to gain insights into physical and psychological changes over time.
Step-by-step explanation:
A case study is an in-depth analysis of a single event, situation, or individual.
It involves collecting a great deal of information from one individual to gain insights into physical and psychological changes over time.
However, this approach is prone to researcher bias and it is difficult to generalize conclusions to the larger population.