Also
If you want to wear a top hat you also have to wear a suit to go with it. You can't just wear a top hat, that just doesn't look right. When you think top hat, think about what you also need with it.
Picture all the things you also need. A suit, a tie, a monocle, some shiny shoes. There's also ... something... else. What is it?
しょ, しょう, そ
か
None
You have a top hat and all the clothes that go with it but you also need a nice car (か) too! You can't just get all dressed up and then have no way to get anywhere to show it off.
Think about all the things you also need when you wear a top hat. The car is probably the most important addition. Otherwise no one can see the top hat in the first place!