TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Critters are our handmade teddy bears in _ sizes.

SOLUTION: three

PROBLEM: Retinoic acid regulates oral epithelial differentiation by _ mechanisms.

SOLUTION: two

PROBLEM: Several insects have a _ stage life cycle.

SOLUTION:
four