Well, I'd say this question has two correct answers, the second one and the last one. Because 'romanticism' is really glorifying nature, it is the most important aspect of that epoch besides feelings. And realism is about the struggles of everyday life. But also, romanticism 'emphasizes the emotions of characters whereas realism highlights human relations'. Both these answers seem correct in my opinion.
The statement which best shows the difference between romantic and realist literature is Romanticism celebrates the beauty of nature, whereas realism depicts the struggles of everyday life.
Realism wad similar to naturalism, it took place in the 19th century second half. Realism refers to the portrayal of reality. Whereas, it is in contrast with romanticism because it doesn't beautify things or appealing.
Realism uses facts to display everyday experiences. Whereas, romanticism uses fantastical situations and personal feelings.
Realism was a way to capture social changes that took place due to industrialization. Romanticism includes an appreciation of nature's beauty, examination of human personality and so forth.
