An Investigation Into Why Does Salad Cause Diarrhea After Lunch

investigation is you trying to look up for more, more, more clue about something, you're looking and looking for further clue. Research, is you're searching about something that is already searched. You. Research research is an ongoing process that takes a much longer period of time and is done with the intent of studying something. an investigation typically looks into allegations or criminal charges. an. the subject of an investigationIt refers to What that investigation is about. Is it a murder investigation or a robbery investigation or a smuggling investigation or a drug distribution investigation or . It is mostly.