1. The problem asks: Which level of measurement has a meaningful zero point? 2. Levels of measurement describe how data is categorized and measured. The four common levels are nominal, ordinal, interval, and ratio. 3. Nominal level classifies data without any order or ranking (e.g., colors, names). 4. Ordinal level classifies data with a meaningful order but without consistent differences between ranks (e.g., rankings). 5. Interval level has ordered categories with equal intervals but no true zero point (e.g., temperature in Celsius). 6. Ratio level has all the properties of interval level plus a meaningful zero point, which allows for meaningful ratios (e.g., height, weight, age). 7. Therefore, the level of measurement with a meaningful zero point is the ratio level. Final answer: ratio