instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Humans are bipeds who stand between _ to six feet in height when fully grown.
answer:
five

question:
Sharks have five to _ gill slits.
answer:
seven

question:
Most ecosystems have only _ trophic levels, and the top carnivores are very rare.
answer:
four