In situ refers to a form of research or analysis that takes place in the natural environment or real-world setting where the subject of study naturally occurs. This approach allows researchers to observe phenomena as they naturally unfold, without artificially manipulating or isolating them in a lab setting. In situ research is common in fields such as ecology, anthropology, geology, and urban planning, where studying phenomena in their natural context is essential for gaining a comprehensive understanding. This approach often involves a mix of observation, data collection, and analysis techniques to gather information directly from the field.