Answer:
Im not sure what Ellis Island is but I know the answer to the other questions.
Pull factors were freedom of religion, cheap farming land, and job opportunities.
Push factors were religious and political restrictions, crop failure, wars, overpopulation, changes in farming techniques, and the overpowering industrial work.
So many immigrants came to the United States for freedom from religious persecution, cheap farmland, and job opportunities. The Irish came because of the potato famine and not being able to own land. Most immigrants came because land at their home country was expensive.