Final answer:
The period between 1820-1850 in America saw a transition from European influenced art to American landscape painting and Realism, focusing on democracy and everyday life. The Civil War era brought further diversification with the inclusion of photography and illustrations.
Step-by-step explanation:
The assertion that the Art Essence of America is a factual statement about the period between 1820-1850 cannot be classified as true or false since it is not a verifiable fact but a topic of discussion. During the early 1800s, American artists began to step away from the strong influence of European styles. The emergence of American landscape painting became significant, highlighting new concepts of the rapidly developing country and its natural wonders.
Artists such as those involved in American Realism introduced themes focusing on democracy, heroic American life, and westward expansion. Unlike European art, which often centered around religious themes or royalty, American art increasingly focused on the average citizen and landscapes. After the Civil War, art expressions expanded to include photography, prints, and magazine illustrations as artists had more opportunities to travel and capture the essence of the nation.