According to Andrew C. Nahm, what is one aspect of Korean culture that was influenced by the spread of Buddhism?

". . . With the rise of Buddhism, Korea’s contacts with the outside world grew, and scholarship,
arts, science and technology which were imported to Korea from China, India and regions
beyond brought about the enrichment of Korean culture. As a result, one of the oldest
astronomical charts in the world was produced, the oldest astronomical observatory called
Ch’ŏmsŏngdae was built, tumuli [burial mounds] architecture represented by the Ssangyŏng
tomb developed, and the system of doctor of medicine was established in Korea. During the
Three Kingdoms period, Korea’s cultural progress in the fields of astronomy, mathematics,
medicine, architecture and metallurgy reached the level of other advanced civilization of the
world. . . ."

The text below clearly explains the influence of Buddhism on the Korean way of life and culture. Buddhism changed the way of thinking and putting into practice the following activities, in an expansive way:

scholarship, arts, science, technology,

development of astronomical observatory / tumuli system of doctor of medicine;

improvements in astronomy, mathematics,

medicine, architecture, metallurgy

Prior to the expansion of Buddhism in both Korea and other regions of Asia, there was a more limited view of the ancestral culture of these peoples. The Belief of Change brought about a greater reflection and change in the thinking of the people of Korea, in their conduct, manifested for example through the arts, music, architecture (as mentioned above), and also in the care of Medicine.