In order to prove that your cause-and-effect relationship exists, it is important to

include evidence to support your claim

find another cause-and-effect relationship similar to yours

explain the meaning of your terms clearly

explain the connection in clear language

The right answer is Include evidence to support your claim.

Causality connects two objects, the first of which is the cause proper, and the second the effect of this cause. For example, for epidemiology, the goal is to discover the existence of causal relationships of certain substances that affect the body and cause certain diseases.

Understanding the principle of causality is a central question in the philosophy of science. Yet advances in the causal analysis have remained largely independent of the methods used in the experimental sciences to identify causal relationships.