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

[Q]: Temperatures occasionally fall below _ but only last a very short time.
[A]: zero

[Q]: Plants have many white flowers with _ petals, giving the plant a white, flat-topped appearance.
[A]: four

[Q]: Vision is arguably the most important of the _ senses.
[A]:
five