Generalizations, explanations of natural phenomena, and additional hypotheses most often come about as a result of

The explanations of natural phenomena, and additional hypothesis most often come about as a result of a scientific theory.

Explanation:

Scientific theory is a general explanation of natural phenomena developed through extensive and reproducible observations, more general and reliable than a hypothesis.

Then Every scientific theory starts as a hypothesis. A scientific hypothesis is a solution for an unexplained occurrence that does not fit into a currently accepted scientific theory. It must be based on careful rational examination of the facts.

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