Final answer:
Mark Twain is the prominent writer known for using the pen name 'Mark Twain' and living from 1835 to 1910. His notable works include 'Adventures of Huckleberry Finn' which is often considered the 'Great American Novel.'
Step-by-step explanation:
Mark Twain is the prominent writer known for using the pen name 'Mark Twain' and living from 1835 to 1910. His real name is Samuel Longhorn Clemens. Twain is known for his travel writings, storytelling on the lecture circuit, and his novels and short stories, particularly Adventures of Huckleberry Finn (1885) which is often touted as the 'Great American Novel.'