What is the interaction between an agent, a host, and the environment called?

A. Web of causality: Describes complex, multifactorial relationships among multiple causes of disease - broader than a triangle model. B. Risk: Refers to the probability of disease or injury, not the model of interaction between agent, host, and environment. C. Natural history of disease: Describes the progression of a disease over time, not its causative interaction components. D. Epidemiologic triangle: A classic model used to explain disease causation involving the interaction between agent, host, and environment.