Final answer:
Common themes in artistic expression during the early 19th century in the United States revealed the ideals and aspirations of the new nation, such as democracy, westward expansion, and heroic American life.
Step-by-step explanation:
During the early 19th century in the United States, common themes in artistic expression reflected the ideals and aspirations of the new nation. American artists began to establish their own style of landscape painting that highlighted the natural wonders and uniqueness of the country. These artists often depicted themes of democracy, heroic American life, and westward expansion, which represented the values and goals of the new nation. After the Civil War, art forms such as photography, prints, and magazine illustrations became popular expressions of the changing society.