Here's why:
* Declarative: Makes a statement. "Here it is" is stating the location of something.
* Interrogative: Asks a question. This phrase doesn't ask anything.
* Exclamatory: Expresses strong emotion. While it could be said with excitement, it's not inherently exclamatory.
* Command: Gives an order or instruction. This phrase doesn't tell someone to do anything.
Let me know if you have another phrase you'd like to analyze!