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

Q: Induction also operates early in development, even before the _ layered embryo forms.

A: three
****
Q: Triaxial fabric is woven with _ sets of yarn whose intersections form equilateral triangles.

A: three
****
Q: Autism is _ times more common in males than females.

A:
four
****