Final answer:
Astrology is not an example of a science.
Step-by-step explanation:
The field that is not an example of a science is astrology. While geology, astronomy, and ecology are all scientific fields that study different aspects of the natural universe, astrology is not considered a science. Astrology is based on the belief that celestial bodies can influence human affairs and the natural world, but it doesn't adhere to the scientific method or principles.