It would be too obvious for me to write the entire letter for you, but I'll include a list of points that you could include in your own writing style:
* Thanking Lee for his letter, and saying that you are happy that he is having a good time.
* Telling him roughly what you're studying at school (without being boring).
* Write about what you would like to do when you leave school.
* Finally, say that you miss him a lot and look forward to hearing from him soon.
Answer:
This is an example of pathos! Pathos is a rhetorical device which appeals to the emotions. By having the audience imagine a sad scenario such as this one, the author is employing pathos.
The last answer sets the most formal tone; "Hello! I was very pleased to meet you at the party last week." the rest are very casual.
It is a quote made when slavery was there is the United States, when most of the people tried to discriminate people on the basis of their race.
If you're asking in Grammatical aspect, then there is nothing complex in this sentence, just means, that if you are black that it's a bad thing [ just by this quote ]
Hope this helps!