1. What makes event handlers in React declarative?
   2. React event handlers are declared as part of the component JSX
2. What's a common use of higher-order event handler functions?
   1. When you have several components that handle the same event, you can use a higher-order function to bind the ID of the item being clicked to the handler function
3. Can you pass inline functions to event properties?
   1. Yes. This is preferable when event handlers are simple one-liners.
4. Why does React use pools of event instances instead of creating new instances with each event?
   3. To avoid invoking the garbage collector to delete unused event instances when lots of events are fired in a small amount of time