Hi. Can you please help me out by answering this question?

Hi. Can you please help me out by answering this question? It is from Western Civilization 1 Course. 

Identify AND describe at least THREE examples of development in Europe during this period of time- the end of the Roman Empire and the beginning of the 15th century. What occurs to put Europe on a path for significant development moving forward? How is this different than in the past? Support your answers with examples.

Thank you.