<prompt> Theory of web of causation was given byMc Mohan and PughPetfenkofferJohn snowLouis Pasteur  <response>: Theory of web of causation was proposed by MacMahon and Pugh in their book: Epidemiological Principles and Methods. Web of causation considers all the predisposing factors of any type and their complex inter-relationship with each other. Ref : Park;s Textbook of Preventive and Social Medicine; 23rd edition; Page 34 