instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Planaria has rudimentary eyes which produce _ images but detect direction.
answer:
no


question:
Diarrhea is an illness that kills _ and one-half million children per year.
answer:
three


question:
Pups are unable to swim or find food until _ to eight weeks old or until the ice melts.
answer:

seven