A set of formal statements that specifies how and why variables or events are related is a theory.
The word theory is a general term that may have different meaning for different kinds of people. For an English professor it may mean a baseless combination of thoughts while for a scientist it means a set of explanation that explains any natural or other phenomenon and is backed by solid evidence.
You may have heard about the Big Bang Theory or the quantum theory of physics they are some huge discoveries found by our scientists after years of studies and experiments.
To know more about the Big Bang Theory refer to the link below
https://brainly.com/question/20349854
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