Chronology is the order of times or dates in which events happened.
a. true
b. false?

I actually think it is true because if something is in chronological order, it is in the order of which it happened

I believe that the last sentence in this excerpt show a nostalgic tone - We used to Greco-Roman wrestle on the floor in there, and tell hilarious jokes, and once we hung a pendulum from the ceiling and put a circle of dominoes on the floor to prove that the earth rotated.
Nostalgia means that you are remembering things from the past fondly, and that you wish those times could come back so that you could relive them again. The narrator is feeling nostalgic about the time he spent with his father when he was a child.