League structure refers to the organization and hierarchy of teams within a sports league. Typically, leagues are divided into different tiers or divisions, where teams compete against each other based on their skill levels. The performance of teams in a season can lead to promotions to higher divisions or relegations to lower ones, ensuring competitive balance. In many leagues, such as English Premier League or Major League Baseball, teams play a set number of games each season. The results determine standings, with the top teams often qualifying for playoffs or championships, while others may face relegation or elimination from postseason play.