In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
--------
Question: Armaments manufacturers use lithium to produce tritium in _ ways.

Answer: two


Question: Aquatic adults have prominent red reathery gills, are large, and have _ toes on each foot.

Answer: four


Question: Every ribosome is made up of _ sites, or subunits.

Answer:
two