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

Q: Sociobiology is the historical outgrowth of _ prerequisite trends.

A: three
****
Q: Mature cysts have _ nuclei while the immature have two.

A: four
****
Q: Human beings consist of body, soul, and spirit _ aspects or levels of existence.

A:
three
****