Advertising. This is something that impacted people in many ways. Think about it, when you walk down the isle to look at cereal. Which box looks more appealing? Most people would say the name brand box with a character or picture on it.
Well
1) Hamlet is a prince
2) Not only is he a prince, but he is the prince of Denmark
3) Something tragic is going to happen because it's the Tragic History.
The italicized word is <em>extremely </em>and the correct answer is intensive.
The word extremely is an adverb, which means that you can rule out <em>noun, adjective, </em>and <em>verb </em>immediately. You can also rule out <em>empty word </em>because <em>extremely </em>has a particular meaning on its own, which means that it cannot be empty. Thus, we are left with one option only - <em />intensive.