**The most important metric is `petal_length`.** The dataset has four numeric measures (petal length and width, sepal length and width), and petal length separates the three species most cleanly. That is the main decision this data serves, so I treated it as the key metric. The choice rests on how the species ranges overlap, not on a formal feature-importance test. **Why petal length** - The species averages are far apart: setosa 1.46, versicolor 4.26, virginica 5.55 (species summary query). - Setosa's largest petal length (1.9) is below versicolor's smallest (3.0), so setosa is completely separable on this measure alone. - Versicolor and virginica overlap only slightly, in the 4.5–5.1 range. Their medians are 4.35 and 5.55. - Sepal width is much weaker. Its species ranges overlap heavily: versicolor 2.0–3.4, virginica 2.2–3.8, setosa 2.3–4.4. **Highest and lowest records** (the extremes query, shown in the rendered result) - **Highest:** a *virginica* specimen with petal length **6.9**, petal width 2.3, sepal length 7.7 and sepal width 2.6. - **Lowest:** a *setosa* specimen with petal length **1.0**, petal width 0.2, sepal length 4.6 and sepal width 3.6. The largest and smallest specimens come from the two most different species. The range from 1.0 to 6.9 is almost seven-fold, and most of that spread comes from differences between species, not variation within them. Each species has 50 specimens, so the comparison is balanced.