Final answer:
The option best described by an explanatory-response relationship is the score on a test, as it illustrates a cause-and-effect relationship influenced by multiple factors. Therefore, the correct option is d) score on a test.
Step-by-step explanation:
Among the options given, the one that is best described by an explanatory-response relationship is d) score on a test. This is because a test score is influenced by various factors such as study habits, comprehension of the material, and the complexity of the test itself. It exemplifies an explanatory-response relationship wherein the score (response) is the result of studied factors (explanatory).
An explanatory-response relationship is characterized by a cause-and-effect mechanism, where one variable explains or predicts the outcome of another variable. In the context of chemistry, understanding these relationships can be crucial for experimental design and interpretation of results.