Was there a well defined beginning and end to the Renaissance?(an exact beginning and an exact end)

 There was no exact beginning and end of the Renaissance.

Explanation:

When we talk about the beginning of the Renaissance, it is not possible to define the exact date of the beginning of the process. The beginnings of the Renaissance are tied to the second half of the fourteenth century and are “tied” to Italian cities, primarily Florence. It is not an event that happened "overnight" but a process that developed over a long period of time, therefore it is not possible to determine the exact year of the beginning of the Renaissance.

The Renaissance as such does not even have an exact ending. It is a process that has evolved and led to some other movements whose precursors are the renaissance. The Renaissance thus led to the Reformation, the Enlightenment, and the Scientific Revolution, so that the Renaissance has no exact end.

i believe your answer is mountains.