When we want to find the ten largest metropolitan areas in the USA, we can assume that the question is asking for cities with the largest population. If we wanted to, we could probably guess at least five of the top ten just by thinking of cities which have NFL, MLB, NBA, and NHL teams. First let's try to guess some of the top cities and then we can check our guesses by doing a quick google search for "US cities highest population".
Here are some obvious guesses:
New York City
Chicago
Los Angeles
Philadelphia
Dallas
Let's check an official list online. Here is the list in order:
1. New York City
2. Los Angeles
3. Chicago
4. Houston
5. Phoenix
6. Philadelphia
7. San Antonio
8. San Diego
9. Dallas
10. San Jose
Here is the source: https://en.wikipedia.org/wiki/List_of_United_States_cities_by_population