Identify and describe three causes of the Civil War. please no links juist a answer and looking for help

1.)Slavery in America ║ Slavery America began in the early 17th Century and continued to be practiced for the next 250 years by the colonies and states. Slaves, mostly from Africa, worked in the production of tobacco crops and later, cotton.Abarham Lincoln’s electon ║The year 1860 marks a very pivotal time for the United States, namely the election of President Abraham Lincoln. This marked election is often thought of as the first event in a series that turned into the civil war that started in April of 1861.Underground railroad║The Underground Railroad was the term used to describe a network of meeting places, secret routes, passageways and safe houses used by slaves in the U.S. to escape slave holding states to northern states and Canada.Mark me brainlist please→:)