What kinds of titles are there and why are titles and first and last lines important?

The main purpose of a title is to garner attention and entice people to start reading your post. ... This is why it is important to spend some time working on your title. It is the first thing that readers see and we all know what they say about first impressions – you never get a second chance to make a first impressions.

because of all the immigration, america became one big melting pot. the diversity of cultures from all over the world made america somewhat divided as well. people that immigrated stayed with their kind, and their traditions, while native born americans stayed with their kind and their traditions. normally, people born in american scorned the immigrants as well. the new religions also divided america. in summary, it took away from the american culture and identified america as the "melting pot."

the type of supporting detail is fact!