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

Q: Critters are our handmade teddy bears in _ sizes.

A: three
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Q: Piglets are born with stripes, which disappear in the first _ months.

A: six
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Q: Amniote skulls in lateral view showing the _ main types of fenestration.

A:
four
****