We talk a lot about "rendering" in React, but oftentimes we lump together
the 3 phases of the rendering process. Understanding the distinction
between these phases can help us in determining a good strategy for
improving the performance of our React apps.


1. What are the 3 phases of the rendering process called in React?



2. What happens in the 1st phase?



3. What happens in the 2nd phase?



4. What happens in the 3rd phase?