Which term best describes a scientifically supported explanation?

• A. Hypothesis
• B. Theory
• C. Observation
• D. Development

Answer: (B)

A well-supported explanation in science is a theory. A theory isn’t just a guess; it’s a broad, coherent framework that explains a wide range of observations and experimental results and makes predictions that can be tested again. The strength of a theory comes from extensive evidence gathered from many experiments and observations, plus its ability to account for new data as science progresses. For example, the theory of evolution explains the diversity of life and yields testable predictions about patterns of relatedness and the fossil record. Observations are the data we collect, not explanations. A hypothesis is a testable idea used to guide experiments but not a comprehensive explanation by itself. Development refers to growth and change, not an explanatory framework. Because a theory integrates evidence and withstands repeated testing, it best fits the idea of a scientifically supported explanation.