In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Q: Pangolins walk on all _ of their stout limbs, which are adapted for digging.

A: four
****
Q: Beavers have an average of _ young once a year.

A: four
****
Q: Amino acids can exist as _ enantiomorphs.

A:
two
****