Resume tracking stabilize motion in After Effects CC 2017

Enable the "Show Options" setting in the flyout menu.

I am not sure what you mean exactly, where is "show options". care to demonstrate?

I closed the Tracking Panel by accident. When I reopened it, the option to analyze frames disappeared. I can't get it back. How do I resume tracking?

it's not your fault but the interface's faulty U.I design which has made many users puzzle over "where's the rest of my panel" question. Motion Tracker in AE CC 2017

where's the rest?

click on the panel to see the borders (your case is easier because you already saw the borders)

now drag the lower border down like this

to avoid this type of scenarios you can:

1. right click on any panel  you want to see in the classic U.I and uncheck stacked panels group under panel group settings

2. work in the standard workspace (like I do)

3. when tracking, work in the motion tracking workspace (the panel will have a lot of room there and won't be narrowed down)