Q: Passage: Sports in the United States are an important part of the country's culture. Based on revenue, the four major professional sports leagues in the United States are Major League Baseball (MLB), the National Basketball Association (NBA), the National Football League (NFL), and the National Hockey League (NHL). Major League Soccer is sometimes included in a "top five" of leagues of the country. All four enjoy wide-ranging domestic media coverage and are considered the preeminent leagues in their respective sports in the world, although only basketball, baseball, and ice hockey have substantial followings in other nations. Three of those leagues have teams that represent Canadian cities, and all four are the most financially lucrative sports leagues of their sport. Soccer is the most popular sport in the United States after football, baseball, basketball and ice hockey, and soccer is the fastest growing sport in the country. Tennis, golf, wrestling, auto racing, arena football, field lacrosse, box lacrosse and volleyball are also popular sports in the country.

Question: Based on this passage, whats the fastest growing sport in the us? Let's give stream of consciousness first:
To answer the above question, the relevant sentence is: Soccer is the most popular sport in the United States after football, baseball, basketball and ice hockey, and soccer is the fastest growing sport in the country. Therefore, the final answer is soccer.