A(n) theory is a well-developed set of ideas that proposes an explanation for observed phenomena.
Theory can be defined as something that help to explain in details what a principle means.
Theory is important when writing a principle or hypothesis as it help to give detailed explanation of what it is that is needed to be know.
Example philosophers and scientist tend to make use of theory to give full explanation or to explain their ideas about a topic.
Therefore A(n) theory is a well-developed set of ideas that proposes an explanation for observed phenomena.
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