9.2 Causation is a concept that describes the relationship between two events, in which the first event (the cause) directly or indirectly leads to the second event (the effect). Causation can be divided into three main types: direct causation, indirect causation, and contributory causation. Direct causation is when one event directly causes the other, such as when pushing a button leads to a light turning on. Indirect causation is when one event indirectly leads to the other, such as when a drop in temperature causes a plant to die. Finally, contributory causation is when multiple factors interact to cause an effect, such as when a combination of genetics and environmental factors cause a person to develop a disease.