Answer: See description
Explanation:
It is the rebirth of all of the aforementioned things, it marks the point in which Europe moved from the medieval age to modernity.
As for how each related thing improved.
Art - A improvement of artistic techniques, focal points, perspective, and light and shadow are things that moved forwards attributing to a more in-depth three-dimensional look for art stemming out of the Renaissance.
Architecture - We see that is called back to the style of classical antiquity, taking inspiration from the romanesque style. And the factors in this time of rebirth caused it to take a shift back to the "Golden Age" of architecture.
Writing - We see this as a rebirth, and while many important people come out of the Renaissance from writing, lots of philosophy came out of this time period so we see a remarkable amount of famous writing come out of the era. In terms of this, the era starts roughly with Descartes's Discourse on Method. We see most of this form due to a rediscovery of the writings of Aristotle.
