Final answer:
Robert Koch developed the postulates for determining disease causation by pathogens.
Step-by-step explanation:
Robert Koch developed the set of postulates for determining whether a particular disease is caused by a particular pathogen. These postulates, known as Koch's postulates, were based on the idea that a specific microbe could be attributed as the cause of a specific disease. Using these postulates, Koch and his colleagues were able to identify the causative pathogens of diseases like anthrax, tuberculosis, and cholera. Koch's postulates were an important contribution to the field of microbiology and laid the foundation for identifying pathogens.