Which of the following is most likely to be an enduring and unchanging truth in science?

The selection of facts as the most likely to represent an enduring and unchanging truth in science is based on the nature of what constitutes a fact. Facts are observable and can be repeatedly verified through experimentation or observation; they are often supported by substantial evidence and generally accepted as true within the scientific community. For instance, the boiling point of water at sea level is a fact that can be demonstrated consistently.

In contrast, assumptions, theories, and hypotheses are more flexible in nature. Assumptions are often the starting points for research but can be challenged as more evidence emerges. Theories, while based on a significant amount of evidence, can be revised or refined when new discoveries are made or when they no longer fit the data. Hypotheses are experimental propositions that require testing and can be proven false.

Therefore, while theories and hypotheses evolve with new scientific knowledge and assumptions can vary, facts remain relatively stable and are foundational to scientific understanding.