Describe the achievements of Sejong that led him to be called one of the greatest Yi kings​

He used bronze to invent the first instruments for measuring rain. As a result, Korea has the world's oldest record of rainfall. Sejong was also involved in producing water clocks, sundials, and globes.

Explanation:

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Explanation:

Sejong the Great (May 7, 1397–April 8, 1450) was king of Korea during the Choson Kingdom (1392–1910). A progressive, scholarly leader, Sejong promoted literacy and was best known for developing a new form of writing to allow Koreans to communicate more effectively. He used bronze to invent the first instruments for measuring rain. As a result, Korea has the world's oldest record of rainfall. Sejong was also involved in producing water clocks, sundials, and globes.

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