PATHOLOGY

Detailed explanation-1: -An exogenous factor is any material that is present and active in an individual organism or living cell but that originated outside that organism, as opposed to an endogenous factor.

Detailed explanation-2: -Exogenous causes are factors that influence the business cycle from outside of the system, e.g. climate (drought and other natural disasters) and the political situation of a country. Endogenous causes are factors that influence the business cycle from inside the system, e.g. total expenditure.