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Nineteen words put C first and V third, and the fourth box is nearly settled before you start.
E takes the fourth box in twelve of the nineteen, sixty three percent, and I takes six. Only one word uses anything else. That makes the fourth box the worst possible place to spend a guess.
The second box is where the work is. O takes seven words, A takes six and I takes five, which is a genuine three way split.
COVER, COVET, COVES, COVED, COVEY and COVEN all share four letters. Landing in that branch confirms most of the word and leaves only the last box open.
CAVED, CAVER and CAVES mirror them exactly one vowel over, which is the same trap with a different first vowel.
CIVIC and CIVIL are the two entries that break the shape, both taking I in the fourth box rather than E.
The last box scatters widely, with L, E, D, R, S, T and Y all taking three words or fewer.
Only two words repeat a letter, so a visible double narrows the page sharply on the rare occasion you see one.
It is the most common word here, but it sits in the crowded COV branch. CIVIL may tell you more in a single turn because it tests the I fourth box directly.
Only in the last box, and both are ordinary words. They are the clearest pair on the page.
A blend or batch of wine. It is the only word here with U in the second box, so it either wins outright or clears a branch.