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

[Q]: Aquatic adults have prominent red reathery gills, are large, and have _ toes on each foot.
[A]: four


[Q]: Sea urchins have _ paired rows of tiny tube feet which are found amongst the spines.
[A]: five


[Q]: Taproots can grow an inch per day and eventually reach _ feet in length.
[A]:
four