Etiology is the investigation of causation or beginning. All the more totally, etiology is the investigation of the causes, starting points, or explanations for how things are, or the manner in which they capacity, or it can allude to the causes themselves. The word is regularly utilized in medication (relating to reasons for illness) and in theory, yet in addition in material science, brain research, government, geology, spatial examination, religious philosophy, and science, regarding the causes or starting points of different marvels.