They are used in collecting data of users or allowing them to control an interface
You shouldbe keeping things simple and not asking too many questions. Otherwise people will get fruestrated.
Label: Allows you to name each section of the form input of type : Allows you to gather an user info text area: allows you to type a messsage for the user. li: allows you to list items out button: allows you to create a submit button
Its basically when the user chooses to do something on the web page the page what I would describe as a plan in place to respond to what the user does.
what will initate the change and what will change
its a function that fires an event. They are important because they tell specific total funtion when a user pick one of several choices
Event bubbling describes how the browser handles events targeted at nested elements.
Capturing is like event bubbling but the order is reversed