Please answer the attached discussion post in regards to the video provided.

The best way to make a case for causation is to conduct an experiment. An experiment imposes a treatment (i.e., the experimenter intervenes) in order to observe its effects. In this video, you will see how we establish causality when experimenting is not possible. https://learner.org/series/against-all-odds-inside-statistics/the-question-of-causation/ While you watch the video, please pay attention to understand the difference between retrospective and prospective studies. Discussion Prompt: Why do prospective studies have more internal validity compared to retrospective studies