Movement at the Surface of a Rain Barrel

DxDetective case Round 1 of 1

Case setup 0 of 6 observations reviewed
Review the situation, then start the case.

Case situation

Review the situation before choosing a next action.

After several warm days, a home gardener sees tiny movements at the surface of a rain barrel. The barrel still holds water from recent showers, and its lid was left ajar during yard work. The player needs to separate a passing surface change from a repeatable container pattern.

Your task: Decide which observations clarify the pattern and which household routine fits the fictional case.