Multiple choice Pick the odd one out. Toads, shoelaces, eels, frogs and hawks Toads Shoelaces Eels Frogs Hawks Reveal answer Fill a bubble to check yourself E Correct answer Explanation Correct. The common factor is the collective noun – knot – used with four of the five given options viz. toads, shoelaces, eels and frogs. The odd one out is the word - hawks. The collective noun for hawks is – kettle, aerie, cast or leash.