Paragraph two of this speech excerpt is one long sentence. Watch President Kennedy deliver this part of the speech again. What technique did he use to make his delivery more effective

pandas are endangered because of habitat destruction by humans.

as of 2014 there were around 2,000 left, since then, it supposedly has risen 17%.

they are a very endangered species.

-theoneandonly003

sentence lenght varies according to word choice.you select which word to use and that will require to use other expressions that collocate with the word chosen.sentence length will vary   according to the choice of words you make to express your ideas.  

i think that the major difference is that it used to be modern