Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Q: Differentiation is caused by the energy going in ____ directions.

A: two
****
Q: Sponges are subdivided into ____ classes.

A: three
****
Q: Families tend to be large, with ____ or more children.

A:
four
****