When the movie ends, what the oak tree does at the theater is that it leaves.
This is a pun supposed to have a humorous effect on the listener or the reader - usually, when a movie ends, people leave the theater. However, since this is a tree, and it's got leaves, you can understand the correlation between the two words.
Answer:
To put yourself in the shoes of others and grow your capacity for empathy, you can hardly do better than reading fiction. Multiple studies have shown that imagining stories helps activate the regions of your brain responsible for better understanding others and seeing the world from a new perspective.
Samuel Gompers was famous because he was an American labor union leader and a key figure in American labor history.