Stalin or Trotsky?

For the history class we had to do a presentation about some pages of the book,Beltran,Felipe,Santiago and I had to do about Stalin orTrotsky?

https://drive.google.com/open?id=1sLShtIFQsv9PLXs0S_4t1AoW2_OZG7VaioMQcOjjVjQ

here i inserted the link of the presentation