A(n) ________ is a well-developed set of ideas that proposes an explanation for observed phenomena.

A(n) theory is a well-developed set of ideas that proposes an explanation for observed phenomena. Theories are essential in scientific inquiry as they provide a framework for understanding how various aspects of the world interact and behave. They are built upon a substantial amount of evidence gathered through experimentation and observation. Unlike mere hypotheses, which are preliminary ideas that seek to explain phenomena, theories have undergone rigorous testing and validation. In the realm of science, a well-accepted theory can help predict future occurrences and guide further research. Examples include the theory of evolution, which explains the diversity of life, and the theory of relativity, which provides an understanding of gravity and the structure of space-time.