Final answer:
A 'Theory' is the term that best describes the conceptual knitting of concepts into a systematic explanation for phenomena, which encompasses well-tested and substantiated explanations derived through scientific methodologies.
Step-by-step explanation:
The question asks to identify the term that defines the knitting of concepts into a coherent system intended to explain phenomena. The correct answer to this question is A) Theory. A scientific theory is a well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method and repeatedly tested and confirmed through observation and experimentation. Hence, it is more than just a hypothesis or a mere model; it is an established framework that explains various observations and is widely accepted in the scientific community.
For instance, the germ theory of disease explains a wide range of observations regarding the spread of illness by microorganisms. A hypothesis, in contrast, is a tentative explanation for scientific observations that can be tested but has not yet been supported by a significant body of evidence.