Using the nonexperimental method, a researcher collects data on exercise and anxiety from a number of people and finds that exercise is negatively related to anxiety—that is, the people who exercise more tend to have lower levels of anxiety. What does this scenario demonstrate? Temporal precedence Covariation between variables Elimination of possible causes Non-sufficient element of inference of cause

This scenario demonstrates "COVARIATION BETWEEN VARIABLES".

Explanation: Covariation between variables is how two variables are interrelated. It shows if two variables are inversely or directly proportional.

Non-experimental research only show how two variables are interrelated, which means that Covariation between variables describes non-experimental research. In an non-experimental research, the research does not accurately determine cause, rather it projects the relationship between the choose variables.

In this research, the researcher collected data on exercise and anxiety, this means the researcher wants to correlate the two variables.

answer; ///i believe the correct answer is (b) the writing of the ancients who lived in india after the indus valley inhabitants died out;