Why Birthrates Among Hispanic Americans Have Plummeted

https://www.nytimes.com/2019/03/07/us/us-birthrate-hispanics-latinos.html?searchResultPosition=8

You have to read the article and do the assignment about it.
Why are birth rates declining in the US?How is this related to Hispanic Americans?Why Hispanic women having less children?
How do these different rates of population growth relate to the demographic transition model?