Among the various factors such as the industrial jobs, political situation, land scarcity and religious factors, the strongest or most valid pull for the Europeans to move to USA was the pull factor of industrial jobs.
America is considered as one of the biggest powers of the world and many giant industries have their origin from US. These industries created a great pull in terms of manpower requirements
The European landscape was changing dramatically. One of the changes took place in the form of religious drift. As the monarchies were becoming obsolete, there was still, restricted freedom for worship. People were required to pay homage to the systems established by the Catholic system. In addition, there was the issues of the high tax on the land. Thus, some people embarked on a journey on sea on the ship called the Mayflower. America, upon their arrival, was a land that represented freedom.
For the 3 take always you can say something like how many people died something important they said in the CNN. For the summary just search up something in google like 9/11 and then just read it and summarize it or you can just watch the CNN