Final answer:
One significant invention originating in Sumer was writing. The Sumerians developed cuneiform, a script characterized by wedge-shaped symbols. It allowed for the recording of laws, religious tracts, property transactions, and commercial exchanges on clay tablets.
Step-by-step explanation:
One significant invention originating in Sumer was writing. The Sumerians developed cuneiform, a script characterized by wedge-shaped symbols, which evolved into a phonetic script based on sounds. They wrote laws, religious tracts, and property transactions on clay tablets, which became durable once baked. Cuneiform allowed for the recording of commercial exchanges, contracts, receipts, taxes, and payrolls. It was a major advancement in communication and record-keeping.