The correct answers to these open questions are the following.
Unfortunately, you did not attach the article, a link to it, or the name of the article. Without that information, we do not know what you are talking about.
However, trying to be of help, we can comment on the following general terms.
People succeed because they demonstrate they have leadership qualities such as knowledge, perseverance, patience, determination, and courage to go on despite the difficulties. They like to be prepared for whatever is coming and have the right answer. They are not afraid of failure and always are pursuing victory and the accomplishments of goals.
Why is Roosevelt considered a successful president?
Franklin D. Roosevelt is considered a successful US President because he knew how to handle the terrible economic crisis during the Great Depression, creating the Nee Deal, a series of programs and legislation to help the American citizens that had lost their jobs.
He also successfully conducted the United States in World War II, until he died.
What characteristics did he possess that contributed to his success?
His leadership, tenacity, vision, courage, and self-confidence.