In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Rams can be policerate, often producing _ horns.
[EX A]: four

[EX Q]: All butterflies have _ pairs of legs.
[EX A]: three

[EX Q]: Koalas move with an awkward gait, on all _ legs, and can also run.
[EX A]:
four