Answer: Deductive Reasoning
Step-by-step explanation:
Ancient Greeks developed theories in a variety of fields, including mathematics, physics, astronomy, and philosophy, among others. Their methods of developing theories varied depending on the field, but there were some common elements.
In general, the Greeks relied on observation and reasoning to develop their theories. They observed the natural world and sought to understand its underlying principles through logical reasoning. They also drew on the work of previous thinkers and built upon it to develop their own theories.
Overall, the Greeks developed their theories through a combination of observation, logical reasoning, and building on the work of previous thinkers. Their methods laid the foundation for much of the scientific and philosophical thinking that came after them.