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

Example Input: World population continues to rise, even as a few countries move toward _ growth.
Example Output: zero

Example Input: Many people spend _ or more hours a day working for someone else.
Example Output: eight

Example Input: Holograms are photographs of the _ dimensional impressions stored on light waves.
Example Output:
three