D. All of the above
His teachings included the idea that everything in the natural world had a purpose and that it was possible to understand the natural world via observation and reason.
- According to him, the ultimate objective for everything in the cosmos is to strive for the highest level of being.
- According to him, the four elements are earth, water, air, and fire.
- According to him, every motion is either natural or violent and involves a persistent push or pull.
Western philosophy and science have greatly benefited from developing his ideas and works.