An accepted and universally true explanation of observed facts is a

Explanation:

A law is defined as a statement that is able to describe an observed fact in nature which will remain true whenever it appears.

For example, law of conservation of mass states that energy can neither be created nor it can be destroyed as it can be converted from one form to another.

This means that if we burn wood then the energy absorbed by the wood will help it to convert into ashes.

Hence, we can conclude that an accepted and universally true explanation of observed facts is a law.

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