Which aspect of Sumerian culture reflects their literacy development?

The choice that reflects the Sumerian culture's literacy development is cuneiform writing. This ancient script, which originated in Sumer around 3200 BCE, represents one of the world's first systems of writing. It was created by pressing a reed stylus into clay tablets, making it a significant advancement in the ability to record information, communicate ideas, and document transactions. The development of cuneiform not only facilitated the administration of complex societies but also allowed for cultural expressions such as literature, legal codes, and historical records, marking a pivotal moment in human civilization. Through this writing system, Sumerians could preserve their language and knowledge, leading to a more educated society that impacted subsequent cultures in the region and beyond. Other aspects such as architecture, pottery techniques, and trade routes, while important in their own right, do not directly signify the evolution and importance of literacy in the same manner as cuneiform writing does.