Which of the following refers to a broad explanation or group of explanations for some aspect of the natural world that is consistently supported by evidence over time?

The correct answer to the following question will be "Scientific theory".

Explanation:

A Scientific theory is an interpretation of a mathematical theorem that could be verified experimentally and confirmed in compliance with the scientific process, using agreed methods for assessment, calculation, and evaluation of tests. The concepts are tested under controlled circumstances, if possible, in an examination.

This refers to a specific interpretation or collection of theories for some aspect of the world of nature reliably supported by facts over the period.

Therefore, Scientific theory is the right answer.