Final answer:
At the start of the 20th century, people were excited about industrialization, social reforms, advancements in medicine and science, and the modern art movement.
Step-by-step explanation:
At the start of the 20th century, people were excited about several things. One major development was the rise of industrialization, which brought about improved technologies and mass production. This led to increased economic growth and new opportunities for many individuals. Additionally, there was a sense of optimism and progressivism as people believed in social reforms and advancements in medicine and science. Lastly, the start of the 20th century marked the beginning of the modern art movement, with artists exploring new styles and expressing themselves in innovative ways.
Learn more about excitement at the start of the 20th century