Final answer:
A theory, in addition to laying out ideas, provides an explanation for observed phenomena and helps scholars analyze and understand various subjects.
Step-by-step explanation:
The primary function of a theory, in addition to laying out multiple ideas, is to provide a well-developed set of ideas that propose an explanation for observed phenomena. Theories are supported by scientific evidence and have undergone rigorous testing and verification. In fields like literature, theories serve as intellectual models to answer interpretive questions and provide different perspectives to analyze texts. In sociology, theories help explain different aspects of social interactions and guide research. Overall, theories allow scholars to explore, understand, and critically think about various subjects.