What are the significant development noted in each priod?

To provide a concise answer, I would need clarification on which periods you are referring to. However, if we consider general historical periods, significant developments in the Ancient period include the rise of agriculture and the establishment of early civilizations. The Medieval period saw the spread of feudalism and the influence of the Church. The Modern period is marked by the Industrial Revolution and advancements in science and technology, while the Contemporary period features globalization and the digital revolution. Please specify the periods for a more tailored response.