In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
--------
Question: Ticks mature in _ stages, moving from egg to larva and nymph to adult.

Answer: four


Question: Most people have _ kidneys.

Answer: two


Question: Copepods are so numerous that it is estimated that they compose seven out of every _ zooplankters.

Answer:
ten